DescTools (version 0.99.40)

SD: (Weighted) Standard Deviation

Description

This function computes the standard deviation of the values in x. If na.rm is TRUE then missing values are removed before computation proceeds.

Usage

SD(x, weights = NULL, na.rm = FALSE, ...)

Arguments

x

a numeric vector or an R object which is coercible to one by as.double(x).

weights

a numerical vector of weights the same length as x giving the weights to use for elements of x.

na.rm

logical. Should missing values be removed?

…

further arguments passed to or from other methods.

Details

Like var this uses denominator $n-1$.

The standard deviation of a zero-length vector (after removal of NAs if na.rm = TRUE) is not defined and gives an error. The standard deviation of a length-one vector is NA.

See Also

var for its square, and mad, the most robust alternative.

Examples

# NOT RUN {
SD(1:2)^2
# }