[R] assignment in lists

[Philippe Grosjean]

Hello,

I do not understand the following behaviour. Could someone explain me what
happens?

> a <- NULL
> a$item <- 1:3
> a$item
[1] 1 2 3
> rm(a)
> a <- NULL
> a[["item"]] <- 1:3
Error: more elements supplied than there are to replace

Why do I get an error message using list[["item"]], and not using list$item?
Best,

Philippe Grosjean

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