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KDATA_HIST_ALLOC(3) Library Functions Manual KDATA_HIST_ALLOC(3) NAME kdata_hist_alloc -- allocate histogram data for plotting LIBRARY library "libkplot" SYNOPSIS #include <cairo.h> #include <kplot.h> struct kdata * kdata_hist_alloc(double rmin, double rmax, size_t bins); DESCRIPTION The kdata_hist_alloc function creates a reference-counted data sources for kplot(3). The histogram is initialised with x-values set to the bucket minimum and y-values set to zero. It uses a histogram data model: the data array is laid out in uniformly-spaced buckets of size (rmax - rmin) / bins, with a given value x falling into bucket [i / bins * (rmax - rmin) <= x < (i + 1) / bins * (rmax - rmin)]. Bucket values are modified with kdata_hist_add(3) and kdata_hist_set(3). RETURN VALUES kdata_hist_alloc returns NULL if memory allocation failed. SEE ALSO kdata_hist_add(3), kplot(3) FreeBSD ports 15.quarterly January 16, 2015 KDATA_HIST_ALLOC(3)
NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | SEE ALSO
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