| sd {base} | R Documentation |
This function computes the standard deviation of the values in
x.
If na.rm is TRUE then missing values are removed before
computation proceeds.
If x is a matrix or a dataframe, a vector of the standard
deviation of the columns is returned.
sd(x, na.rm = FALSE)
var for its square, and mad, the most
robust alternative.
sd(1:2) ^ 2