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Calculate range

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neingeist 2014-02-14 20:41:32 +01:00
parent e646660868
commit 6146beb0f8
1 changed files with 33 additions and 1 deletions
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34
av-variance.c
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@ -2,6 +2,7 @@
#include <stdbool.h>
#include <assert.h>
#include <math.h>
#include <values.h>
double mean(double set[], int set_n) {
double sum = 0.0;
@ -35,6 +36,30 @@ double sample_stddev(double set[], int set_n) {
return sqrt(sample_variance(set, set_n));
}
double set_min(double set[], int set_n) {
double min = MAXDOUBLE;
for(int i=0; i<set_n; i++) {
min=fmin(set[i], min);
}
return min;
}
double set_max(double set[], int set_n) {
double max = MINDOUBLE;
for (int i=0; i<set_n; i++) {
max=fmax(set[i], max);
}
return max;
}
double range(double set[], int set_n) {
return set_max(set, set_n) - set_min(set, set_n);
}
int main() {
// Some data
double d[] = {7, 8, 5, 1, 6, 2};
@ -56,7 +81,14 @@ int main() {
assert(isalmost(sample_stddev(d, d_n), 2.787, 0.001));
assert(isalmost(sample_stddev(e, e_n), 6.447, 0.001));
// XXX Range
assert(isalmost(set_min(d, d_n), 1.0, 0.001));
assert(isalmost(set_max(d, d_n), 8.0, 0.001));
assert(isalmost(set_min(e, e_n), -10.0, 0.001));
assert(isalmost(set_max(e, e_n), +14.0, 0.001));
assert(isalmost(range(d, d_n), 7.0, 0.001));
assert(isalmost(range(e, e_n), 24.0, 0.001));
// XXX Mode
// XXX Percentile
}