How is this R function returning a value?

Asked Oct 20 '19 at 17:37

Active Sep 23 '20 at 21:00

Viewed 38 times

I have the following R code:

n <- 100
simul <- function() {
  x <- sample(c(-1, 1), n, replace = TRUE)
  s <- cumsum(c(0, x))
}
(tmp = simul())

In the above code, simul() returns a vector to tmp. How is this possible, since the function simul() does not define any return value (at least, explicitly)?

edited Sep 23 '20 at 21:00

halfer

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asked Oct 20 '19 at 17:37

The Pointer

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1

you are assigning ` – akrun Oct 20 '19 at 17:39
1

Ahh, I see. What is `.Last.Value`? Is there any documentation that explains this (I haven't encountered any mention of this)? – The Pointer Oct 20 '19 at 17:40
1

You can test it by adding one more line `s1 – akrun Oct 20 '19 at 17:41
Tried it and it was as you said. Is this mentioned in the r documentation? – The Pointer Oct 20 '19 at 17:43
@akrun That question doesn't really address the same point in a direct and clear way. – The Pointer Oct 20 '19 at 17:48
I guess the question is similar to the one you mentioned. If I quote the answer `By default, a function returns the value of the last expression evaluated,`. What do you expect as an answer here? – akrun Oct 20 '19 at 17:48
1

From https://www.rdocumentation.org/packages/base/versions/3.6.1/topics/function : *If the end of a function is reached without calling `return`, the value of the last evaluated expression is returned.* – The Pointer Oct 20 '19 at 17:51
1

@akrun yes, I understand now. Thank you for the clarification. – The Pointer Oct 20 '19 at 17:52

How is this R function returning a value?

0 Answers0