2 #include <grass/imagery.h>
13 return ((sum2 - sum * sum / n) / (n - 1));
16 double I_stddev(
double sum,
double sum2,
int n)
19 return ((
double)-99.0);
double I_stddev(double sum, double sum2, int n)
double I_variance(double sum, double sum2, int n)