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/*
cmap_stats.c: deal with map statistics.
Copyright (C) 2001 CCLRC, Charles Ballard
This library is free software: you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public License
version 3, modified in accordance with the provisions of the
license to address the requirements of UK law.
You should have received a copy of the modified GNU Lesser General
Public License along with this library. If not, copies may be
downloaded from http://www.ccp4.ac.uk/ccp4license.php
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
*/
#include <math.h>
#include "cmaplib.h"
#include "cmap_stats.h"
#include "cmap_errno.h"
/*! Internal: use floats in range section_begin to section_end
to update the map statistics.
\param stats (CMMFile_Stats *)
\param section_begin (void *) start of section
\param section_end (void *) one past end-of-section
\return total of map elements so far */
int stats_update(CMMFile_Stats *stats, void *section_begin,
void *section_end)
{
float *ufp = (float *) section_begin;
double val;
if (stats->total == 0 && *ufp < -1.0e10 ) {
stats->offset = *ufp;
}
while (ufp < (float *) section_end) {
val = (double) (*ufp - stats->offset);
stats->mean += val;
stats->rms += val * val;
stats->min = MIN( stats->min, *ufp);
stats->max = MAX( stats->max, *ufp);
ufp++;
}
stats->total += (float *)section_end - (float *)section_begin;
return (stats->total);
}
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