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/***********************************************/
/**
* @file matrixGeneratorSlice.h
*
* @brief Slice of a matrix.
*
* @author Torsten Mayer-Guerr
* @date 2017-09-01
*
*/
/***********************************************/
#ifndef __GROOPS_MATRIXGENERATORSLICE__
#define __GROOPS_MATRIXGENERATORSLICE__
// Latex documentation
#ifdef DOCSTRING_MatrixGenerator
static const char *docstringMatrixGeneratorSlice = R"(
\subsection{Slice}
Slice of a matrix.
)";
#endif
/***********************************************/
#include "base/import.h"
#include "matrixGenerator.h"
/***** CLASS ***********************************/
/** @brief Slice of a matrix.
* @ingroup matrixGeneratorGroup
* @see MatrixGenerator */
class MatrixGeneratorSlice : public MatrixGeneratorBase
{
MatrixGeneratorPtr matrix;
ExpressionVariablePtr exprRow, exprCol;
ExpressionVariablePtr exprRows, exprCols;
public:
MatrixGeneratorSlice(Config &config);
void compute(Matrix &A, UInt rowsBefore, UInt columnsBefore, UInt &startRow, UInt &startCol);
};
/***********************************************/
/***** Inlines *********************************/
/***********************************************/
inline MatrixGeneratorSlice::MatrixGeneratorSlice(Config &config)
{
try
{
readConfig(config, "matrix", matrix, Config::MUSTSET, "", "");
readConfig(config, "startRow", exprRow, Config::DEFAULT, "0", "start row of matrix (variables: rowsBefore, columnsBefore, rows, columns)");
readConfig(config, "startColumn", exprCol, Config::DEFAULT, "0", "start column of matrix (variables: rowsBefore, columnsBefore, rows, columns)");
readConfig(config, "rows", exprRows, Config::DEFAULT, "0", "0: until end (variables: rowsBefore, columnsBefore, rows, columns)");
readConfig(config, "columns", exprCols, Config::DEFAULT, "0", "0: until end (variables: rowsBefore, columnsBefore, rows, columns)");
if(isCreateSchema(config)) return;
}
catch(std::exception &e)
{
GROOPS_RETHROW(e)
}
}
/***********************************************/
inline void MatrixGeneratorSlice::compute(Matrix &A, UInt rowsBefore, UInt columnsBefore, UInt &/*startRow*/, UInt &/*startCol*/)
{
try
{
A = matrix->compute();
VariableList varList;
varList.setVariable("rowsBefore", static_cast<Double>(rowsBefore));
varList.setVariable("columnsBefore", static_cast<Double>(columnsBefore));
varList.setVariable("rows", static_cast<Double>(A.rows()));
varList.setVariable("columns", static_cast<Double>(A.columns()));
const UInt row = static_cast<UInt>(exprRow->evaluate(varList));
const UInt col = static_cast<UInt>(exprCol->evaluate(varList));
const UInt rows = static_cast<UInt>(exprRows->evaluate(varList));
const UInt cols = static_cast<UInt>(exprCols->evaluate(varList));
A = A.slice(row, col, rows > 0 ? rows : A.rows()-row, cols > 0 ? cols : A.columns()-col);
}
catch(std::exception &e)
{
GROOPS_RETHROW(e)
}
}
/***********************************************/
#endif
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