Why NA^0 returns 1 and not NA?

Asked Nov 24 '22 at 08:34

Active Nov 24 '22 at 15:10

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How can I make it that R return to NA^0 = NA

NA*0 = NA
NA^0 = 1
NA^0.0000001 = NA

edited Nov 24 '22 at 15:10

Phil

asked Nov 24 '22 at 08:34

hamed

1

The provided "existing answer" will tell you _why_ this occurs, but doesn't explain how to change it, as you asked. You can write a custom function that checks if the input is NA, and if so returns NA, otherwise raises to the supplied power. – Paul Stafford Allen Nov 24 '22 at 09:39
1

You could redefine `^` to return `NA` if input is `NA` and return the normal value otherwise: `'^' <- function(x,y) ifelse(is.na(x),NA,.Primitive("^")(x,y))` – shaun_m Nov 24 '22 at 10:01
The title of your question and the body of your question ask two different questions. – Mark Rotteveel Nov 24 '22 at 15:20

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