cutBySD: Returns center values of x, the mean, mean-std.dev, mean+std.dev
Description
If the numeric variable has fewer than 6 unique observed
values, this will send the data to cutByTable.
Usage
cutBySD(x, n = 3)
Arguments
x
A numeric variable
n
Should be either 3 or 5. If 3, values that
divide the data at c(m-sd, m, m+sd) are returned. If 5,
the returned values are c(m-2sd, m-sd, m, m+sd, m+2sd).
Other values of n will be rounded to 3 or 5.