ranksum requires tiedrank?

I assumed that the function ranksum computed ranks, etc. automatically, but I ran across the documentation for tiedrank and now I am not sure. Do I need to run my data through tiedrank before running it through ranksum?

I am using ranksum because my data are non-normal, not because the data are inherently ordinal.

Answer 1

[the cyclist]

No, you do not. ranksum() calls tiedrank() internally. You can see this by typing

 >> edit ranksum