sd Standard DeviationThis function computes the standard deviation of the values in x. If na.rm is TRUE then missing values are removed before computation proceeds.
sd(x, na.rm = FALSE)
x | a numeric vector or an R object but not a |
na.rm | logical. Should missing values be removed? |
Like var this uses denominator n - 1.
The standard deviation of a length-one or zero-length vector is NA.
var for its square, and mad, the most robust alternative.
sd(1:2) ^ 2
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Licensed under the GNU General Public License.