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, na.rm = FALSE)
Arguments
x
a numeric vector or an R object which is coercible to one
by as.double(x).
na.rm
logical. Should missing values be removed?
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.