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 GNU Scientific Library Reference Manual - Third Edition (v1.12) by M. Galassi, J. Davies, J. Theiler, B. Gough, G. Jungman, P. Alken, M. Booth, F. RossiPaperback (6"x9"), 592 pages, 60 figuresISBN 0954612078RRP £24.95 (\$39.95)

## 21.19 2D Histogram Operations

Function: int gsl_histogram2d_equal_bins_p (const gsl_histogram2d * h1, const gsl_histogram2d * h2)
This function returns 1 if all the individual bin ranges of the two histograms are identical, and 0 otherwise.
Function: int gsl_histogram2d_add (gsl_histogram2d * h1, const gsl_histogram2d * h2)
This function adds the contents of the bins in histogram h2 to the corresponding bins of histogram h1, i.e. h'_1(i,j) = h_1(i,j) + h_2(i,j). The two histograms must have identical bin ranges.
Function: int gsl_histogram2d_sub (gsl_histogram2d * h1, const gsl_histogram2d * h2)
This function subtracts the contents of the bins in histogram h2 from the corresponding bins of histogram h1, i.e. h'_1(i,j) = h_1(i,j) - h_2(i,j). The two histograms must have identical bin ranges.
Function: int gsl_histogram2d_mul (gsl_histogram2d * h1, const gsl_histogram2d * h2)
This function multiplies the contents of the bins of histogram h1 by the contents of the corresponding bins in histogram h2, i.e. h'_1(i,j) = h_1(i,j) * h_2(i,j). The two histograms must have identical bin ranges.
Function: int gsl_histogram2d_div (gsl_histogram2d * h1, const gsl_histogram2d * h2)
This function divides the contents of the bins of histogram h1 by the contents of the corresponding bins in histogram h2, i.e. h'_1(i,j) = h_1(i,j) / h_2(i,j). The two histograms must have identical bin ranges.
Function: int gsl_histogram2d_scale (gsl_histogram2d * h, double scale)
This function multiplies the contents of the bins of histogram h by the constant scale, i.e. h'_1(i,j) = h_1(i,j) scale.
Function: int gsl_histogram2d_shift (gsl_histogram2d * h, double offset)
This function shifts the contents of the bins of histogram h by the constant offset, i.e. h'_1(i,j) = h_1(i,j) + offset.
 ISBN 0954612078 GNU Scientific Library Reference Manual - Third Edition (v1.12) See the print edition