Replace NAs with mean of the same column of a data.table

Question

I want to replace NAs present in a column of a DATA TABLE with the mean of the same column. I am doing the following. But it is not working.

ww <- data.ta         


        

Answer 1

na.aggregate in the zoo package replaces NAs with the mean of the non-NAs in the same column:

library(zoo)

ww[, Sepal.Length := na.aggregate(Sepal.Length)]