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810 lines
39 KiB
810 lines
39 KiB
#ifndef STORM_STORAGE_SPARSEMATRIX_H_
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#define STORM_STORAGE_SPARSEMATRIX_H_
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#include <algorithm>
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#include <iostream>
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#include <cstdint>
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#include <iterator>
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#include "src/storage/BitVector.h"
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#include "src/utility/constants.h"
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#include "src/utility/OsDetection.h"
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#include "src/exceptions/InvalidArgumentException.h"
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#include "src/exceptions/OutOfRangeException.h"
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#include <boost/functional/hash.hpp>
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#include <boost/container/flat_map.hpp>
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// Forward declaration for adapter classes.
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namespace storm {
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namespace adapters {
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class GmmxxAdapter;
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class EigenAdapter;
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class StormAdapter;
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}
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}
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namespace storm {
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namespace storage {
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// Forward declare matrix class.
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template<typename T> class SparseMatrix;
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template<typename IndexType, typename ValueType>
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class MatrixEntry {
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public:
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typedef IndexType index_type;
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typedef ValueType value_type;
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/*!
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* Constructs a matrix entry with the given column and value.
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*
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* @param column The column of the matrix entry.
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* @param value The value of the matrix entry.
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*/
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MatrixEntry(index_type column, value_type value);
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/*!
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* Move-constructs the matrix entry fro the given column-value pair.
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*
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* @param pair The column-value pair from which to move-construct the matrix entry.
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*/
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MatrixEntry(std::pair<index_type, value_type>&& pair);
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MatrixEntry() = default;
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MatrixEntry(MatrixEntry const& other) = default;
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MatrixEntry& operator=(MatrixEntry const& other) = default;
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#ifndef WINDOWS
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MatrixEntry(MatrixEntry&& other) = default;
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MatrixEntry& operator=(MatrixEntry&& other) = default;
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#endif
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/*!
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* Retrieves the column of the matrix entry.
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*
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* @return The column of the matrix entry.
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*/
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index_type const& getColumn() const;
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/*!
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* Sets the column of the current entry.
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*
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* @param column The column to set for this entry.
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*/
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void setColumn(index_type const& column);
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/*!
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* Retrieves the value of the matrix entry.
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*
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* @return The value of the matrix entry.
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*/
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value_type const& getValue() const;
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/*!
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* Sets the value of the entry in the matrix.
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*
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* @param value The value that is to be set for this entry.
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*/
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void setValue(value_type const& value);
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/*!
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* Retrieves a pair of column and value that characterizes this entry.
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*
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* @return A column-value pair that characterizes this entry.
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*/
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std::pair<index_type, value_type> const& getColumnValuePair() const;
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private:
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// The actual matrix entry.
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std::pair<index_type, value_type> entry;
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};
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/*!
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* Computes the hash value of a matrix entry.
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*/
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template<typename IndexType, typename ValueType>
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std::size_t hash_value(MatrixEntry<IndexType, ValueType> const& matrixEntry) {
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std::size_t seed = 0;
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boost::hash_combine(seed, matrixEntry.getColumn());
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boost::hash_combine(seed, matrixEntry.getValue());
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return seed;
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}
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/*!
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* A class that can be used to build a sparse matrix by adding value by value.
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*/
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template<typename ValueType>
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class SparseMatrixBuilder {
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public:
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typedef uint_fast64_t index_type;
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typedef ValueType value_type;
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/*!
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* Constructs a sparse matrix builder producing a matrix with the given number of rows, columns and entries.
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* The number of rows, columns and entries is reserved upon creation. If more rows/columns or entries are
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* added, this will possibly lead to a reallocation.
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*
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* @param rows The number of rows of the resulting matrix.
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* @param columns The number of columns of the resulting matrix.
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* @param entries The number of entries of the resulting matrix.
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* @param forceDimensions If this flag is set, the matrix is expected to have exactly the given number of
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* rows, columns and entries for all of these entities that are set to a nonzero value.
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* @param hasCustomRowGrouping A flag indicating whether the builder is used to create a non-canonical
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* grouping of rows for this matrix.
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* @param rowGroups The number of row groups of the resulting matrix. This is only relevant if the matrix
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* has a custom row grouping.
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*/
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SparseMatrixBuilder(index_type rows = 0, index_type columns = 0, index_type entries = 0, bool forceDimensions = true, bool hasCustomRowGrouping = false, index_type rowGroups = 0);
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/*!
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* Sets the matrix entry at the given row and column to the given value. After all entries have been added,
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* a call to finalize(false) is mandatory.
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*
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* Note: this is a linear setter. That is, it must be called consecutively for each entry, row by row and
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* column by column. As multiple entries per column are admitted, consecutive calls to this method are
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* admitted to mention the same row-column-pair. If rows are skipped entirely, the corresponding rows are
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* treated as empty. If these constraints are not met, an exception is thrown.
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*
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* @param row The row in which the matrix entry is to be set.
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* @param column The column in which the matrix entry is to be set.
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* @param value The value that is to be set at the specified row and column.
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*/
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void addNextValue(index_type row, index_type column, value_type const& value);
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/*!
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* Starts a new row group in the matrix. Note that this needs to be called before any entries in the new row
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* group are added.
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*
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* @param startingRow The starting row of the new row group.
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*/
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void newRowGroup(index_type startingRow);
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/*
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* Finalizes the sparse matrix to indicate that initialization process has been completed and the matrix
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* may now be used. This must be called after all entries have been added to the matrix via addNextValue.
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*
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* @param overriddenRowCount If this is set to a value that is greater than the current number of rows,
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* this will cause the finalize method to add empty rows at the end of the matrix until the given row count
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* has been matched. Note that this will *not* override the row count that has been given upon construction
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* (if any), but will only take effect if the matrix has been created without the number of rows given.
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* @param overriddenColumnCount If this is set to a value that is greater than the current number of columns,
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* this will cause the finalize method to set the number of columns to the given value. Note that this will
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* *not* override the column count that has been given upon construction (if any), but will only take effect
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* if the matrix has been created without the number of columns given. By construction, the matrix will have
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* no entries in the columns that have been added this way.
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* @param overriddenRowGroupCount If this is set to a value that is greater than the current number of row
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* groups, this will cause the method to set the number of row groups to the given value. Note that this will
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* *not* override the row group count that has been given upon construction (if any), but will only take
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* effect if the matrix has been created without the number of row groups given. By construction, the row
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* groups added this way will be empty.
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*/
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SparseMatrix<value_type> build(index_type overriddenRowCount = 0, index_type overriddenColumnCount = 0, index_type overriddenRowGroupCount = 0);
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private:
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// A flag indicating whether a row count was set upon construction.
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bool initialRowCountSet;
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// The row count that was initially set (if any).
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index_type initialRowCount;
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// A flag indicating whether a column count was set upon construction.
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bool initialColumnCountSet;
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// The column count that was initially set (if any).
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index_type initialColumnCount;
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// A flag indicating whether an entry count was set upon construction.
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bool initialEntryCountSet;
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// The number of entries in the matrix.
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index_type initialEntryCount;
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// A flag indicating whether the initially given dimensions are to be enforced on the resulting matrix.
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bool forceInitialDimensions;
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// A flag indicating whether the builder is to construct a custom row grouping for the matrix.
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bool hasCustomRowGrouping;
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// A flag indicating whether the number of row groups was set upon construction.
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bool initialRowGroupCountSet;
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// The number of row groups in the matrix.
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index_type initialRowGroupCount;
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std::vector<index_type> rowGroupIndices;
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// The storage for the columns and values of all entries in the matrix.
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std::vector<MatrixEntry<index_type, value_type>> columnsAndValues;
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// A vector containing the indices at which each given row begins. This index is to be interpreted as an
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// index in the valueStorage and the columnIndications vectors. Put differently, the values of the entries
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// in row i are valueStorage[rowIndications[i]] to valueStorage[rowIndications[i + 1]] where the last
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// entry is not included anymore.
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std::vector<index_type> rowIndications;
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// Stores the current number of entries in the matrix. This is used for inserting an entry into a matrix
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// with preallocated storage.
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index_type currentEntryCount;
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// Stores the row of the last entry in the matrix. This is used for correctly inserting an entry into a
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// matrix.
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index_type lastRow;
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// Stores the column of the currently last entry in the matrix. This is used for correctly inserting an
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// entry into a matrix.
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index_type lastColumn;
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// Stores the highest column at which an entry was inserted into the matrix.
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index_type highestColumn;
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// Stores the currently active row group. This is used for correctly constructing the row grouping of the
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// matrix.
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index_type currentRowGroup;
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};
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/*!
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* A class that holds a possibly non-square matrix in the compressed row storage format. That is, it is supposed
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* to store non-zero entries only, but zeros may be explicitly stored if necessary for certain operations.
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* Likewise, the matrix is intended to store one value per column only. However, the functions provided by the
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* matrix are implemented in a way that makes it safe to store several entries per column.
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*
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* The creation of a matrix can be done in several ways. If the number of rows, columns and entries is known
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* prior to creating the matrix, the matrix can be constructed using this knowledge, which saves reallocations.
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* On the other hand, if either one of these values is not known a priori, the matrix can be constructed as an
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* empty matrix that needs to perform reallocations as more and more entries are inserted in the matrix.
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*
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* It should be observed that due to the nature of the sparse matrix format, entries can only be inserted in
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* order, i.e. row by row and column by column.
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*/
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template<typename ValueType>
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class SparseMatrix {
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public:
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// Declare adapter classes as friends to use internal data.
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friend class storm::adapters::GmmxxAdapter;
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friend class storm::adapters::EigenAdapter;
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friend class storm::adapters::StormAdapter;
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typedef uint_fast64_t index_type;
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typedef ValueType value_type;
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typedef typename std::vector<MatrixEntry<index_type, value_type>>::iterator iterator;
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typedef typename std::vector<MatrixEntry<index_type, value_type>>::const_iterator const_iterator;
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/*!
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* This class represents a number of consecutive rows of the matrix.
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*/
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class rows {
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public:
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/*!
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* Constructs an object that represents the rows defined by the value of the first entry, the column
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* of the first entry and the number of entries in this row set.
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*
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* @param begin An iterator that points to the beginning of the row.
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* @param entryCount The number of entrys in the rows.
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*/
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rows(iterator begin, index_type entryCount);
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/*!
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* Retrieves an iterator that points to the beginning of the rows.
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*
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* @return An iterator that points to the beginning of the rows.
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*/
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iterator begin();
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/*!
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* Retrieves an iterator that points past the last entry of the rows.
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*
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* @return An iterator that points past the last entry of the rows.
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*/
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iterator end();
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/*!
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* Retrieves the number of entries in the rows.
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*
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* @return The number of entries in the rows.
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*/
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index_type getNumberOfEntries() const;
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private:
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// The pointer to the columnd and value of the first entry.
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iterator beginIterator;
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// The number of non-zero entries in the rows.
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index_type entryCount;
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};
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/*!
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* This class represents a number of consecutive rows of the matrix.
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*/
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class const_rows {
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public:
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/*!
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* Constructs an object that represents the rows defined by the value of the first entry, the column
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* of the first entry and the number of entries in this row set.
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*
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* @param begin An iterator that points to the beginning of the row.
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* @param entryCount The number of entrys in the rows.
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*/
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const_rows(const_iterator begin, index_type entryCount);
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/*!
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* Retrieves an iterator that points to the beginning of the rows.
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*
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* @return An iterator that points to the beginning of the rows.
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*/
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const_iterator begin() const;
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/*!
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* Retrieves an iterator that points past the last entry of the rows.
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*
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* @return An iterator that points past the last entry of the rows.
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*/
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const_iterator end() const;
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/*!
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* Retrieves the number of entries in the rows.
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*
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* @return The number of entries in the rows.
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*/
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index_type getNumberOfEntries() const;
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private:
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// The pointer to the columnd and value of the first entry.
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const_iterator beginIterator;
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// The number of non-zero entries in the rows.
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index_type entryCount;
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};
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/*!
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* An enum representing the internal state of the matrix. After creation, the matrix is UNINITIALIZED.
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* Only after a call to finalize(), the status of the matrix is set to INITIALIZED and the matrix can be
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* used.
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*/
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enum MatrixStatus { UNINITIALIZED, INITIALIZED };
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/*!
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* Constructs an empty sparse matrix.
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*/
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SparseMatrix();
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/*!
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* Constructs a sparse matrix by performing a deep-copy of the given matrix.
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*
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* @param other The matrix from which to copy the content.
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*/
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SparseMatrix(SparseMatrix<value_type> const& other);
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/*!
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* Constructs a sparse matrix by moving the contents of the given matrix to the newly created one.
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*
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* @param other The matrix from which to move the content.
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*/
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SparseMatrix(SparseMatrix<value_type>&& other);
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/*!
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* Constructs a sparse matrix by copying the given contents.
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*
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* @param columnCount The number of columns of the matrix.
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* @param rowIndications The row indications vector of the matrix to be constructed.
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* @param columnsAndValues The vector containing the columns and values of the entries in the matrix.
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* @param rowGroupIndices The vector representing the row groups in the matrix.
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*/
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SparseMatrix(index_type columnCount, std::vector<index_type> const& rowIndications, std::vector<MatrixEntry<index_type, value_type>> const& columnsAndValues, std::vector<index_type> const& rowGroupIndices);
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/*!
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* Constructs a sparse matrix by moving the given contents.
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*
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* @param columnCount The number of columns of the matrix.
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* @param rowIndications The row indications vector of the matrix to be constructed.
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* @param columnsAndValues The vector containing the columns and values of the entries in the matrix.
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* @param rowGroupIndices The vector representing the row groups in the matrix.
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*/
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SparseMatrix(index_type columnCount, std::vector<index_type>&& rowIndications, std::vector<MatrixEntry<index_type, value_type>>&& columnsAndValues, std::vector<index_type>&& rowGroupIndices);
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/*!
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* Assigns the contents of the given matrix to the current one by deep-copying its contents.
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*
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* @param other The matrix from which to copy-assign.
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*/
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SparseMatrix<value_type>& operator=(SparseMatrix<value_type> const& other);
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/*!
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* Assigns the contents of the given matrix to the current one by moving its contents.
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*
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* @param other The matrix from which to move to contents.
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*/
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SparseMatrix<value_type>& operator=(SparseMatrix<value_type>&& other);
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/*!
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* Determines whether the current and the given matrix are semantically equal.
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*
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* @param other The matrix with which to compare the current matrix.
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* @return True iff the given matrix is semantically equal to the current one.
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*/
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bool operator==(SparseMatrix<value_type> const& other) const;
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/*!
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* Returns the number of rows of the matrix.
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*
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* @return The number of rows of the matrix.
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*/
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index_type getRowCount() const;
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/*!
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* Returns the number of columns of the matrix.
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*
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* @return The number of columns of the matrix.
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*/
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index_type getColumnCount() const;
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/*!
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* Returns the number of entries in the matrix.
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*
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* @return The number of entries in the matrix.
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*/
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index_type getEntryCount() const;
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/*!
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* Returns the number of nonzero entries in the matrix.
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*
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* @return The number of nonzero entries in the matrix.
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*/
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index_type getNonzeroEntryCount() const;
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/*!
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* Returns the number of row groups in the matrix.
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*
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* @return The number of row groups in the matrix.
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*/
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index_type getRowGroupCount() const;
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/*!
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* Returns the size of the given row group.
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*
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* @param group The group whose size to retrieve.
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* @return The number of rows that belong to the given row group.
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*/
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index_type getRowGroupSize(index_type group) const;
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/*!
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* Returns the grouping of rows of this matrix.
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*
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* @return The grouping of rows of this matrix.
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*/
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std::vector<index_type> const& getRowGroupIndices() const;
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/*!
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* This function makes the given rows absorbing.
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*
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* @param rows A bit vector indicating which rows are to be made absorbing.
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*/
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void makeRowsAbsorbing(storm::storage::BitVector const& rows);
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/*!
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* This function makes the groups of rows given by the bit vector absorbing.
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*
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* @param rowGroupConstraint A bit vector indicating which row groups to make absorbing.
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*/
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void makeRowGroupsAbsorbing(storm::storage::BitVector const& rowGroupConstraint);
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/*!
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* This function makes the given row Dirac. This means that all entries will be set to 0 except the one
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* at the specified column, which is set to 1 instead.
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*
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* @param row The row to be made Dirac.
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* @param column The index of the column whose value is to be set to 1.
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*/
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void makeRowDirac(index_type row, index_type column);
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/*
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* Sums the entries in the given row and columns.
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*
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* @param row The row whose entries to add.
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* @param columns A bit vector that indicates which columns to add.
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* @return The sum of the entries in the given row and columns.
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*/
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value_type getConstrainedRowSum(index_type row, storm::storage::BitVector const& columns) const;
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/*!
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* Computes a vector whose i-th entry is the sum of the entries in the i-th selected row where only those
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* entries are added that are in selected columns.
|
|
*
|
|
* @param rowConstraint A bit vector that indicates for which rows to compute the constrained sum.
|
|
* @param columnConstraint A bit vector that indicates which columns to add in the selected rows.
|
|
*
|
|
* @return A vector whose elements are the sums of the selected columns in each row.
|
|
*/
|
|
std::vector<value_type> getConstrainedRowSumVector(storm::storage::BitVector const& rowConstraint, storm::storage::BitVector const& columnConstraint) const;
|
|
|
|
/*!
|
|
* Computes a vector whose entries represent the sums of selected columns for all rows in selected row
|
|
* groups.
|
|
*
|
|
* @param rowGroupConstraint A bit vector that indicates which row groups are to be considered.
|
|
* @param columnConstraint A bit vector that indicates which columns to sum.
|
|
* @return A vector whose entries represent the sums of selected columns for all rows in selected row
|
|
* groups.
|
|
*/
|
|
std::vector<value_type> getConstrainedRowGroupSumVector(storm::storage::BitVector const& rowGroupConstraint, storm::storage::BitVector const& columnConstraint) const;
|
|
|
|
/*!
|
|
* Creates a submatrix of the current matrix by dropping all rows and columns whose bits are not
|
|
* set to one in the given bit vector.
|
|
*
|
|
* @param useGroups If set to true, the constraint for the rows is interpreted as selecting whole row groups.
|
|
* @param constraint A bit vector indicating which rows to keep.
|
|
* @param columnConstraint A bit vector indicating which columns to keep.
|
|
* @param insertDiagonalEntries If set to true, the resulting matrix will have zero entries in column i for
|
|
* each row i, if there is no value yet. This can then be used for inserting other values later.
|
|
* @return A matrix corresponding to a submatrix of the current matrix in which only rows and columns given
|
|
* by the constraints are kept and all others are dropped.
|
|
*/
|
|
SparseMatrix getSubmatrix(bool useGroups, storm::storage::BitVector const& rowConstraint, storm::storage::BitVector const& columnConstraint, bool insertDiagonalEntries = false) const;
|
|
|
|
/*!
|
|
* Selects exactly one row from each row group of this matrix and returns the resulting matrix.
|
|
*
|
|
* @param rowGroupToRowIndexMapping A mapping from each row group index to a selected row in this group.
|
|
* @param insertDiagonalEntries If set to true, the resulting matrix will have zero entries in column i for
|
|
* each row in row group i. This can then be used for inserting other values later.
|
|
* @return A submatrix of the current matrix by selecting one row out of each row group.
|
|
*/
|
|
SparseMatrix selectRowsFromRowGroups(std::vector<index_type> const& rowGroupToRowIndexMapping, bool insertDiagonalEntries = true) const;
|
|
|
|
/*!
|
|
* Transposes the matrix.
|
|
*
|
|
* @param joinGroups A flag indicating whether the row groups are supposed to be treated as single rows.
|
|
*
|
|
* @return A sparse matrix that represents the transpose of this matrix.
|
|
*/
|
|
storm::storage::SparseMatrix<value_type> transpose(bool joinGroups = false) const;
|
|
|
|
/*!
|
|
* Transforms the matrix into an equation system. That is, it transforms the matrix A into a matrix (1-A).
|
|
*/
|
|
void convertToEquationSystem();
|
|
|
|
/*!
|
|
* Inverts all entries on the diagonal, i.e. sets the diagonal values to one minus their previous value.
|
|
* Requires the matrix to contain each diagonal entry and to be square.
|
|
*/
|
|
void invertDiagonal();
|
|
|
|
/*!
|
|
* Negates (w.r.t. addition) all entries that are not on the diagonal.
|
|
*/
|
|
void negateAllNonDiagonalEntries();
|
|
|
|
/*!
|
|
* Sets all diagonal elements to zero.
|
|
*/
|
|
void deleteDiagonalEntries();
|
|
|
|
/*!
|
|
* Calculates the Jacobi decomposition of this sparse matrix. For this operation, the matrix must be square.
|
|
*
|
|
* @return A pair (L+U, D^-1) containing the matrix L+U and the inverted diagonal matrix D^-1.
|
|
*/
|
|
std::pair<storm::storage::SparseMatrix<value_type>, storm::storage::SparseMatrix<value_type>> getJacobiDecomposition() const;
|
|
|
|
/*!
|
|
* Performs a pointwise matrix multiplication of the matrix with the given matrix and returns a vector
|
|
* containing the sum of the entries in each row of the resulting matrix.
|
|
*
|
|
* @param otherMatrix A reference to the matrix with which to perform the pointwise multiplication. This
|
|
* matrix must be a submatrix of the current matrix in the sense that it may not have entries at indices
|
|
* where there is no entry in the current matrix.
|
|
* @return A vector containing the sum of the entries in each row of the matrix resulting from pointwise
|
|
* multiplication of the current matrix with the given matrix.
|
|
*/
|
|
std::vector<value_type> getPointwiseProductRowSumVector(storm::storage::SparseMatrix<value_type> const& otherMatrix) const;
|
|
|
|
/*!
|
|
* Multiplies the matrix with the given vector and writes the result to the given result vector. If a
|
|
* parallel implementation is available and it is considered worthwhile (heuristically, based on the metrics
|
|
* of the matrix), the multiplication is carried out in parallel.
|
|
*
|
|
* @param vector The vector with which to multiply the matrix.
|
|
* @param result The vector that is supposed to hold the result of the multiplication after the operation.
|
|
* @return The product of the matrix and the given vector as the content of the given result vector.
|
|
*/
|
|
void multiplyWithVector(std::vector<value_type> const& vector, std::vector<value_type>& result) const;
|
|
|
|
/*!
|
|
* Multiplies the matrix with the given vector in a sequential way and writes the result to the given result
|
|
* vector.
|
|
*
|
|
* @param vector The vector with which to multiply the matrix.
|
|
* @param result The vector that is supposed to hold the result of the multiplication after the operation.
|
|
* @return The product of the matrix and the given vector as the content of the given result vector.
|
|
*/
|
|
void multiplyWithVectorSequential(std::vector<value_type> const& vector, std::vector<value_type>& result) const;
|
|
|
|
#ifdef STORM_HAVE_INTELTBB
|
|
/*!
|
|
* Multiplies the matrix with the given vector in a parallel fashion using Intel's TBB and writes the result
|
|
* to the given result vector.
|
|
*
|
|
* @param vector The vector with which to multiply the matrix.
|
|
* @param result The vector that is supposed to hold the result of the multiplication after the operation.
|
|
* @return The product of the matrix and the given vector as the content of the given result vector.
|
|
*/
|
|
void multiplyWithVectorParallel(std::vector<value_type> const& vector, std::vector<value_type>& result) const;
|
|
#endif
|
|
|
|
/*!
|
|
* Computes the sum of the entries in a given row.
|
|
*
|
|
* @param row The row that is to be summed.
|
|
* @return The sum of the selected row.
|
|
*/
|
|
value_type getRowSum(index_type row) const;
|
|
|
|
/*!
|
|
* Checks if the current matrix is a submatrix of the given matrix, where a matrix A is called a submatrix
|
|
* of B if B has no entries in position where A has none. Additionally, the matrices must be of equal size.
|
|
*
|
|
* @param matrix The matrix that possibly is a supermatrix of the current matrix.
|
|
* @return True iff the current matrix is a submatrix of the given matrix.
|
|
*/
|
|
bool isSubmatrixOf(SparseMatrix<value_type> const& matrix) const;
|
|
|
|
template<typename TPrime>
|
|
friend std::ostream& operator<<(std::ostream& out, SparseMatrix<TPrime> const& matrix);
|
|
|
|
/*!
|
|
* Returns the size of the matrix in memory measured in bytes.
|
|
*
|
|
* @return The size of the matrix in memory measured in bytes.
|
|
*/
|
|
uint_fast64_t getSizeInMemory() const;
|
|
|
|
/*!
|
|
* Calculates a hash value over all values contained in the matrix.
|
|
*
|
|
* @return size_t A hash value for this matrix.
|
|
*/
|
|
std::size_t hash() const;
|
|
|
|
/*!
|
|
* Returns an object representing the consecutive rows given by the parameters.
|
|
*
|
|
* @param startRow The starting row.
|
|
* @param endRow The ending row (which is included in the result).
|
|
* @return An object representing the consecutive rows given by the parameters.
|
|
*/
|
|
const_rows getRows(index_type startRow, index_type endRow) const;
|
|
|
|
/*!
|
|
* Returns an object representing the consecutive rows given by the parameters.
|
|
*
|
|
* @param startRow The starting row.
|
|
* @param endRow The ending row (which is included in the result).
|
|
* @return An object representing the consecutive rows given by the parameters.
|
|
*/
|
|
rows getRows(index_type startRow, index_type endRow);
|
|
|
|
/*!
|
|
* Returns an object representing the given row.
|
|
*
|
|
* @param row The row to get.
|
|
* @return An object representing the given row.
|
|
*/
|
|
const_rows getRow(index_type row) const;
|
|
|
|
/*!
|
|
* Returns an object representing the given row.
|
|
*
|
|
* @param row The row to get.
|
|
* @return An object representing the given row.
|
|
*/
|
|
rows getRow(index_type row);
|
|
|
|
/*!
|
|
* Returns an object representing the given row group.
|
|
*
|
|
* @param rowGroup The row group to get.
|
|
* @return An object representing the given row group.
|
|
*/
|
|
const_rows getRowGroup(index_type rowGroup) const;
|
|
|
|
/*!
|
|
* Returns an object representing the given row group.
|
|
*
|
|
* @param rowGroup The row group to get.
|
|
* @return An object representing the given row group.
|
|
*/
|
|
rows getRowGroup(index_type rowGroup);
|
|
|
|
/*!
|
|
* Retrieves an iterator that points to the beginning of the given row.
|
|
*
|
|
* @param row The row to the beginning of which the iterator has to point.
|
|
* @return An iterator that points to the beginning of the given row.
|
|
*/
|
|
const_iterator begin(index_type row = 0) const;
|
|
|
|
/*!
|
|
* Retrieves an iterator that points to the beginning of the given row.
|
|
*
|
|
* @param row The row to the beginning of which the iterator has to point.
|
|
* @return An iterator that points to the beginning of the given row.
|
|
*/
|
|
iterator begin(index_type row = 0);
|
|
|
|
/*!
|
|
* Retrieves an iterator that points past the end of the given row.
|
|
*
|
|
* @param row The row past the end of which the iterator has to point.
|
|
* @return An iterator that points past the end of the given row.
|
|
*/
|
|
const_iterator end(index_type row) const;
|
|
|
|
/*!
|
|
* Retrieves an iterator that points past the end of the given row.
|
|
*
|
|
* @param row The row past the end of which the iterator has to point.
|
|
* @return An iterator that points past the end of the given row.
|
|
*/
|
|
iterator end(index_type row);
|
|
|
|
/*!
|
|
* Retrieves an iterator that points past the end of the last row of the matrix.
|
|
*
|
|
* @return An iterator that points past the end of the last row of the matrix.
|
|
*/
|
|
const_iterator end() const;
|
|
|
|
/*!
|
|
* Retrieves an iterator that points past the end of the last row of the matrix.
|
|
*
|
|
* @return An iterator that points past the end of the last row of the matrix.
|
|
*/
|
|
iterator end();
|
|
|
|
private:
|
|
/*!
|
|
* Creates a submatrix of the current matrix by keeping only row groups and columns in the given row group
|
|
* and column constraint, respectively.
|
|
*
|
|
* @param rowGroupConstraint A bit vector indicating which row groups to keep.
|
|
* @param columnConstraint A bit vector indicating which columns to keep.
|
|
* @param rowGroupIndices A vector indicating which rows belong to a given row group.
|
|
* @param insertDiagonalEntries If set to true, the resulting matrix will have zero entries in column i for
|
|
* each row in row group i. This can then be used for inserting other values later.
|
|
* @return A matrix corresponding to a submatrix of the current matrix in which only row groups and columns
|
|
* given by the row group constraint are kept and all others are dropped.
|
|
*/
|
|
SparseMatrix getSubmatrix(storm::storage::BitVector const& rowGroupConstraint, storm::storage::BitVector const& columnConstraint, std::vector<index_type> const& rowGroupIndices, bool insertDiagonalEntries = false) const;
|
|
|
|
// The number of rows of the matrix.
|
|
index_type rowCount;
|
|
|
|
// The number of columns of the matrix.
|
|
index_type columnCount;
|
|
|
|
// The number of entries in the matrix.
|
|
index_type entryCount;
|
|
|
|
// The number of nonzero entries in the matrix.
|
|
index_type nonzeroEntryCount;
|
|
|
|
// The storage for the columns and values of all entries in the matrix.
|
|
std::vector<MatrixEntry<index_type, value_type>> columnsAndValues;
|
|
|
|
// A vector containing the indices at which each given row begins. This index is to be interpreted as an
|
|
// index in the valueStorage and the columnIndications vectors. Put differently, the values of the entries
|
|
// in row i are valueStorage[rowIndications[i]] to valueStorage[rowIndications[i + 1]] where the last
|
|
// entry is not included anymore.
|
|
std::vector<index_type> rowIndications;
|
|
|
|
// A vector indicating the row groups of the matrix.
|
|
std::vector<index_type> rowGroupIndices;
|
|
};
|
|
|
|
} // namespace storage
|
|
} // namespace storm
|
|
|
|
#endif // STORM_STORAGE_SPARSEMATRIX_H_
|