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KDATA_STDDEV_ADD(3) |
Library Functions Manual |
KDATA_STDDEV_ADD(3) |
NAME
kdata_stddev_attach — attach source for standard deviation data plotting
LIBRARY
library “libkplot”
SYNOPSIS
#include <cairo.h>
#include <kplot.h>
int
kdata_stddev_attach(
struct kdata *dst,
struct kdata *source);
DESCRIPTION
The
kdata_stddev_attach function attaches a data source
source to a standard deviation data source
dst allocated with
kdata_stddev_alloc(3). The internal buffers will be increased, if necessary, to the size of the new buffer. If the buffer is increased, the standard deviation values of the new buckets are set to zero. The x-values of the new pairs are set to the new source's x-values.
Passing
NULL as
source will simply return.
RETURN VALUES
kdata_stddev_attach returns 0 if memory allocation failed or if
dst was not allocated with
kdata_stddev_alloc(3).
SEE ALSO
kdata_stddev_alloc(3),
kplot(3)
Donald E. Knuth, The Art of Computer Programming: Seminumerical Algorithms, 3rd Edition, Addison-Wesley, Volume 2, 232, Boston, 1998.
CAVEATS
If you attach multiple sources with different x-values, the standard deviation x-values will be inconsistent.