Standard deviation for the normal distribution.
(randn only).
atleast_2d
Logical indicating whether or not to force column vectors
to have a second dimension equal to one. Defaults to FALSE. This
behavior can also be changed globally using, for example
options(atleast_2d = TRUE).
Value
A matrix or array of pseudorandom numbers. If the result is a
matrix, it will have class c("matrix", "mat").