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MatConcatenate.h

Go to the documentation of this file.

#ifndef Impala_Core_Matrix_MatConcatenate_h
#define Impala_Core_Matrix_MatConcatenate_h

#include "Core/Matrix/MatFunc.h"
#include "Core/Array/SetPart.h"

namespace Impala
{
namespace Core
{
namespace Matrix
{

// concatenate horizontally (e.g. aaa and bbb becomes aaabbb)
template<class ArrayT>
inline ArrayT*
MatConcatenateHorizontal(std::vector<ArrayT*> matrices)
{
    ILOG_VAR(Core.Matrix.MatConcatenateHorizontal);
    int rows = MatNrRow(matrices[0]);
    int cols = 0;
    for(int i = 0; i < matrices.size(); i++)
    {
        cols += MatNrCol(matrices[i]);
        if(rows != MatNrRow(matrices[i]))
            ILOG_ERROR("nonconformant MatConcatenateHorizontal operands.");
    }

    ArrayT* res = MatCreate<ArrayT>(rows, cols);
    int startCol = 0;
    for(int i = 0; i < matrices.size(); i++)
    {
        SetPart(res, matrices[i], 0, 0, MatNrCol(matrices[i]), MatNrRow(matrices[i]), startCol, 0);
        startCol += MatNrCol(matrices[i]);
    }
    return res;
}

} // namespace Matrix
} // namespace Core
} // namespace Impala

#endif

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