Learn R Programming

pracma (version 1.8.8)

std: Standard Deviation (Matlab Style)

Description

Standard deviation of the values of x.

Usage

std(x, flag=0)

Arguments

x
numeric vector or matrix
flag
numeric scalar. If 0, selects unbiased algorithm; and if 1, selects the biased version.

Value

  • Return value depends on argument x. If vector, returns the standard deviation. If matrix, returns vector containing the standard deviation of each column.

Details

If flag = 0 the result is the square root of an unbiased estimator of the variance. std(X,1) returns the standard deviation producing the second moment of the set of values about their mean.

Examples

Run this code
std(1:10)          # 3.027650
std(1:10, flag=1)  # 2.872281

Run the code above in your browser using DataLab