Mean function always returns NULL in R-CodePudding

The mean function is always returning NULL, no matter what I input. For example, mean(1) and mean(c(1, 2, 3)) both return NULL. I tried this on another computer and it gave me the correct values. I am using RStudio Version 2022.02.2 Build 485, "Prairie Trillium" Release for macOS and have unchecked all packages except 'base' in my library. Thanks!

CodePudding user response：

You probably have redefined the mean function and this new definition as been saved as part of the workspace. This workspace is loaded again when you start R and overwrite the definition of mean from base.

With the limited information you have provided, here are a few pointers:

mean(seq(3))
# overwriting base mean so mean(seq(3)) returns NULL
mean <- function(...) NULL
mean(seq(3))
base::mean(seq(3))
# restoring mean to base::mean
mean <- base::mean
mean(seq(3))

returns:

2
NULL
2
2

If you redefine mean <- base::mean, this will likely solve your issue.