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This function computes the standard deviation of the values in x. If na.rm is TRUE then missing values are removed before computation proceeds.
x
na.rm
TRUE
sd(x, na.rm = FALSE)
a numeric vector or an R object but not a factor coercible to numeric by as.double(x).
factor
as.double(x)
logical. Should missing values be removed?
Like var this uses denominator \(n - 1\).
var
The standard deviation of a length-one or zero-length vector is NA.
NA
var for its square, and mad, the most robust alternative.
mad
# NOT RUN { sd(1:2) ^ 2 # }
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