stdeviation: Calculating the Standard Deviation
In Andy-McCarthy/BasicMath:

Description Usage Arguments Value Examples

Calculates the standard deviation. By selecting sample = TRUE, the user chooses to calculate the sample standard deviation, where the sum of square is divided by n-1. By selecting sample = FALSE, the calculation is treated as a population standard deviation, and the sum of squares is divided by n.

1	stdeviation(input, na.rm = FALSE, sample = TRUE)

`input`	a vector of numbers
`na.rm`	true or false for removing NAs from the vector before calculations
`sample`	true or false where true represents a sample standard deviation and false represents a population standard deviation

A number

a <- c(2,4,6,8)
stdeviation(a)

b <- c(NA,2,4,NA,8)
stdeviation(b)

d <- c(NA,2,4,NA,8)
stdeviation(d,na.rm=T)

e <- c(NA,2,4,8,NA)
stdeviation(e,na.rm=T,sample=F)