C 语言实例 - 计算标准偏差
C 语言教程
· 2019-02-21 07:11:50
计算标准偏差。
实例
#include <stdio.h>
#include <math.h>
float calculateSD(float data[]);
int main()
{
int i;
float data[10];
printf("输入10个元素: ");
for(i=0; i < 10; ++i)
scanf("%f", &data[i]);
printf("\n标准偏差 = %.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);
}
输出结果为：
输入10个元素: 1 2 3 4 5 6 7 8 9 10 标准偏差 = 2.872281
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