While this is mainly an
internal function, it is available for everyone since I could not find
a function that calculates a weighted standard deviation.
Usage
wtd_sd(x, wt = NULL, na.rm = TRUE)
Arguments
- x
A numeric vector that you want to calculate the SD
- wt
A numeric vector indicating the weights used in the calculation
- na.rm
Logical. Indicates if NAs should be removed or not
Value
A number indicating the weighted SD of x
Details
Thank you to the team at Hmisc for the creation of Hmisc::wtd.var().
This function could not have been created without it. I simplified their
source code and then took the square root.
