meanDeviations: Function to calculate the mean and deviations from mean
In multilevelTools: Multilevel and Mixed Effects Model Diagnostics and Effect Sizes

Description Usage Arguments Value Examples

Tiny helper function to calculate the mean and deviations from the mean, both returned as a list. Works nicely with data.table to calculate a between and within variable.

1	meanDeviations(x, na.rm = TRUE)

`x`	A vector, appropriate for the `mean` function.
`na.rm`	A logical, whether to remove missing or not. Defaults to `TRUE`.

A list of the mean (first element) and deviations from the mean (second element).

## simple example showing what it does
meanDeviations(1:10)

## example use case, applied to a data.table
library(data.table)
d <- as.data.table(iris)
d[, c("BSepal.Length", "WSepal.Length") := meanDeviations(Sepal.Length),
  by = Species]
str(d)

rm(d)