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#include "Main.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include "Defines.h"
#include "Error.h"
#include "HpFile.h"
#include "Utilities.h"
/* own stuff */
#include "Deviation.h"
/*
* Reorder the identifiers in the identifier table so that the
* ones whose data points exhibit the mininal standard deviation
* come first.
*/
void
Deviation(void)
{
intish i;
intish j;
floatish dev;
struct chunk* ch;
int min;
floatish t;
struct entry* e;
floatish *averages;
floatish *deviations;
averages = (floatish*) xmalloc(nidents * sizeof(floatish));
deviations = (floatish*) xmalloc(nidents * sizeof(floatish));
/* find averages */
for (i = 0; i < nidents; i++) {
averages[i] = 0.0;
}
for (i = 0; i < nidents; i++) {
for (ch = identtable[i]->chk; ch; ch = ch->next) {
for (j = 0; j < ch->nd; j++) {
averages[i] += ch->d[j].value;
}
}
}
for (i = 0; i < nidents; i++) {
averages[i] /= (floatish) nsamples;
}
/* calculate standard deviation */
for (i = 0; i < nidents; i++) {
deviations[i] = 0.0;
}
for (i = 0; i < nidents; i++) {
for (ch = identtable[i]->chk; ch; ch = ch->next) {
for (j = 0; j < ch->nd; j++) {
dev = ch->d[j].value - averages[i];
deviations[i] += dev * dev;
}
}
}
for (i = 0; i < nidents; i++) {
deviations[i] = (floatish) sqrt ((doublish) (deviations[i] /
(floatish) (nsamples - 1)));
}
/* sort on basis of standard deviation */
for (i = 0; i < nidents-1; i++) {
min = i;
for (j = i+1; j < nidents; j++) {
if (deviations[ j ] < deviations[min]) {
min = j;
}
}
t = deviations[min];
deviations[min] = deviations[i];
deviations[i] = t;
e = identtable[min];
identtable[min] = identtable[i];
identtable[i] = e;
}
free(averages);
free(deviations);
}
void
Identorder(int iflag) /* iflag is a funny three-way flag ? WDP 95/03 */
{
int i;
int j;
int min;
struct entry* e;
/* sort on basis of ident string */
if (iflag > 0) {
/* greatest at top i.e. smallest at start */
for (i = 0; i < nidents-1; i++) {
min = i;
for (j = i+1; j < nidents; j++) {
if (strcmp(identtable[j]->name, identtable[min]->name) < 0) {
min = j;
}
}
e = identtable[min];
identtable[min] = identtable[i];
identtable[i] = e;
}
} else {
/* smallest at top i.e. greatest at start */
for (i = 0; i < nidents-1; i++) {
min = i;
for (j = i+1; j < nidents; j++) {
if (strcmp(identtable[j]->name, identtable[min]->name) > 0) {
min = j;
}
}
e = identtable[min];
identtable[min] = identtable[i];
identtable[i] = e;
}
}
}
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