var
Basics
var is a function that calculates the variance of a vector of values.
Examples
How do I get a vector’s variance when some of the values are: NA, NaN?
Click to see solution
See our mean page for information on na.rm.
var(c(1,2,3,NaN), na.rm=TRUE)[1] 1
var(c(1,2,3,NA), na.rm=TRUE)[1] 1
var(c(1,2,NA,NaN,4), na.rm=TRUE)[1] 2.333333
How do I get the standard deviation of a vector of values, without using sd?
Click to see solution
The standard deviation is equal to the square root of the variance.
sqrt(var(c(1,2,3,NaN), na.rm=TRUE))[1] 1
sqrt(var(c(1,2,3,NA), na.rm=TRUE))[1] 1
sqrt(var(c(1,2,NA,NaN,4), na.rm=TRUE))[1] 1.527525