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<h3 class="section">21.19 2D Histogram Operations</h3>
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— Function: int <b>gsl_histogram2d_equal_bins_p</b> (<var>const gsl_histogram2d * h1, const gsl_histogram2d * h2</var>)<var><a name="index-gsl_005fhistogram2d_005fequal_005fbins_005fp-1838"></a></var><br>
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<blockquote><p>This function returns 1 if all the individual bin ranges of the two
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histograms are identical, and 0 otherwise.
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</p></blockquote></div>
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— Function: int <b>gsl_histogram2d_add</b> (<var>gsl_histogram2d * h1, const gsl_histogram2d * h2</var>)<var><a name="index-gsl_005fhistogram2d_005fadd-1839"></a></var><br>
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<blockquote><p>This function adds the contents of the bins in histogram <var>h2</var> to the
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corresponding bins of histogram <var>h1</var>,
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i.e. h'_1(i,j) = h_1(i,j) + h_2(i,j).
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The two histograms must have identical bin ranges.
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</p></blockquote></div>
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— Function: int <b>gsl_histogram2d_sub</b> (<var>gsl_histogram2d * h1, const gsl_histogram2d * h2</var>)<var><a name="index-gsl_005fhistogram2d_005fsub-1840"></a></var><br>
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<blockquote><p>This function subtracts the contents of the bins in histogram <var>h2</var> from the
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corresponding bins of histogram <var>h1</var>,
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i.e. h'_1(i,j) = h_1(i,j) - h_2(i,j).
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The two histograms must have identical bin ranges.
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</p></blockquote></div>
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— Function: int <b>gsl_histogram2d_mul</b> (<var>gsl_histogram2d * h1, const gsl_histogram2d * h2</var>)<var><a name="index-gsl_005fhistogram2d_005fmul-1841"></a></var><br>
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<blockquote><p>This function multiplies the contents of the bins of histogram <var>h1</var>
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by the contents of the corresponding bins in histogram <var>h2</var>,
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i.e. h'_1(i,j) = h_1(i,j) * h_2(i,j).
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The two histograms must have identical bin ranges.
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</p></blockquote></div>
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— Function: int <b>gsl_histogram2d_div</b> (<var>gsl_histogram2d * h1, const gsl_histogram2d * h2</var>)<var><a name="index-gsl_005fhistogram2d_005fdiv-1842"></a></var><br>
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<blockquote><p>This function divides the contents of the bins of histogram <var>h1</var>
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by the contents of the corresponding bins in histogram <var>h2</var>,
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i.e. h'_1(i,j) = h_1(i,j) / h_2(i,j).
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The two histograms must have identical bin ranges.
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</p></blockquote></div>
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— Function: int <b>gsl_histogram2d_scale</b> (<var>gsl_histogram2d * h, double scale</var>)<var><a name="index-gsl_005fhistogram2d_005fscale-1843"></a></var><br>
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<blockquote><p>This function multiplies the contents of the bins of histogram <var>h</var>
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by the constant <var>scale</var>, i.e. <!-- {$h'_1(i,j) = h_1(i,j) * \hbox{\it scale}$} -->
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h'_1(i,j) = h_1(i,j) scale.
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</p></blockquote></div>
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— Function: int <b>gsl_histogram2d_shift</b> (<var>gsl_histogram2d * h, double offset</var>)<var><a name="index-gsl_005fhistogram2d_005fshift-1844"></a></var><br>
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<blockquote><p>This function shifts the contents of the bins of histogram <var>h</var>
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by the constant <var>offset</var>, i.e. <!-- {$h'_1(i,j) = h_1(i,j) + \hbox{\it offset}$} -->
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h'_1(i,j) = h_1(i,j) + offset.
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</p></blockquote></div>
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