sd
Compute Standard Deviation

### Description

Computes the standard deviation of a vector

### Usage

    sd(x, na.rm = FALSE)

### Arguments

x | a numeric vector, or something that can be converted to one with as.double.
na.rm | a logical value. If TRUE, missing values (NAs) are removed. Otherwise a missing value in the input causes the output to be missing value. Default value is FALSE.

Value
returns the standard deviation (the square root of the variance) of the vector.
Note
In version 2.5 of Spotfire Enterprise Runtime for R and before and in version 2.15.3 of Open Source R and before, sd computed the standard deviation of each column of a data.frame or matrix. It no longer does (this makes it act like the other univariate summary functions).
See Also
colVars
Examples

    sd(log(1:12))
    sqrt(var(log(1:12)))
    sd(c(1, NA, 3.5, 6.7, 9.0))
    sd(c(1, NA, 3.5, 6.7, 9.0), na.rm=TRUE)

Package stats version 6.1.5-18
Package Index