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<h4 class="subsection">8.4.9 Exchanging rows and columns</h4>
<p>The following functions can be used to exchange the rows and columns of
a matrix.
<div class="defun">
— Function: int <b>gsl_matrix_swap_rows</b> (<var>gsl_matrix * m, size_t i, size_t j</var>)<var><a name="index-gsl_005fmatrix_005fswap_005frows-971"></a></var><br>
<blockquote><p>This function exchanges the <var>i</var>-th and <var>j</var>-th rows of the matrix
<var>m</var> in-place.
</p></blockquote></div>
<div class="defun">
— Function: int <b>gsl_matrix_swap_columns</b> (<var>gsl_matrix * m, size_t i, size_t j</var>)<var><a name="index-gsl_005fmatrix_005fswap_005fcolumns-972"></a></var><br>
<blockquote><p>This function exchanges the <var>i</var>-th and <var>j</var>-th columns of the
matrix <var>m</var> in-place.
</p></blockquote></div>
<div class="defun">
— Function: int <b>gsl_matrix_swap_rowcol</b> (<var>gsl_matrix * m, size_t i, size_t j</var>)<var><a name="index-gsl_005fmatrix_005fswap_005frowcol-973"></a></var><br>
<blockquote><p>This function exchanges the <var>i</var>-th row and <var>j</var>-th column of the
matrix <var>m</var> in-place. The matrix must be square for this operation to
be possible.
</p></blockquote></div>
<div class="defun">
— Function: int <b>gsl_matrix_transpose_memcpy</b> (<var>gsl_matrix * dest, const gsl_matrix * src</var>)<var><a name="index-gsl_005fmatrix_005ftranspose_005fmemcpy-974"></a></var><br>
<blockquote><p>This function makes the matrix <var>dest</var> the transpose of the matrix
<var>src</var> by copying the elements of <var>src</var> into <var>dest</var>. This
function works for all matrices provided that the dimensions of the matrix
<var>dest</var> match the transposed dimensions of the matrix <var>src</var>.
</p></blockquote></div>
<div class="defun">
— Function: int <b>gsl_matrix_transpose</b> (<var>gsl_matrix * m</var>)<var><a name="index-gsl_005fmatrix_005ftranspose-975"></a></var><br>
<blockquote><p>This function replaces the matrix <var>m</var> by its transpose by copying
the elements of the matrix in-place. The matrix must be square for this
operation to be possible.
</p></blockquote></div>
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