C Language Example - Calculate Standard Deviation
Calculate the standard deviation.
Example
#include <stdio.h>
#include <math.h>
float calculateSD(float data[]);
int main()
{
int i;
float data[10];
printf("Enter 10 elements:");
for(i=0; i < 10; ++i)
scanf("%f", &data[i]);
printf("\nStandard deviation = %.6f", calculateSD(data));
return 0;
}
float calculateSD(float data[])
{
float sum = 0.0, mean, standardDeviation = 0.0;
int i;
for(i=0; i<10; ++i)
{
sum += data[i];
}
mean = sum/10;
for(i=0; i<10; ++i)
standardDeviation += pow(data[i] - mean, 2);
return sqrt(standardDeviation/10);
}
The output result is:
输入10个元素: 1 2 3 4 5 6 7 8 9 10 标准偏差 = 2.872281other extensions