1IM_MEAN_STD(3)             Library Functions Manual             IM_MEAN_STD(3)
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NAME

6       im_mean_std_double_buffer, im_mean_std_int_buffer - calculates the mean
7       and the std of data held by a by an int or double buffer
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SYNOPSIS

10       #include <vips/vips.h>
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12       int im_mean_std_int_buffer(buf, size, mean, std)
13       int *buf;
14       int size;
15       double *mean, *std;
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17       int im_mean_std_double_buffer(buf, size, mean, std)
18       double *buf;
19       int size;
20       double *mean, *std;
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DESCRIPTION

24       im_mean_std_int_buffer() and im_mean_std_double_buffer() calculate  the
25       mean  and  the  standard deviation (std) of data held by the integer or
26       double buffer buf.  The buffer has  size  elements.   The  results  are
27       returned to the locations pointed by mean and std.  It is the responsi‐
28       bility of the calling function to ensure that there is enough  data  in
29       the buffer.
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RETURN VALUE

32       Both functions returns 0 on success and -1 on error.
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SEE ALSO

35       im_avg(3), im_stats(3).
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38       N. Dessipris
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AUTHOR

41       N. Dessipris - 10/05/1991
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45                                  10 May 1991                   IM_MEAN_STD(3)
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