I have a very big function which takes hours to give me the result. I forgot to name it. Is there any way that I can show the result of my function?
Thanks in advance.
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You mean you forgot to assign the result? As in `sum(x)` instead of `y <- sum(x)`? If so, you're out of luck. – LAP Dec 07 '17 at 12:33
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yes. I forgot to assign a name to it. – Dec 07 '17 at 12:33
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@Roland thanks. It is very big issue. – Dec 07 '17 at 12:34
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3On the positive side: You've learned something. – Roland Dec 07 '17 at 12:34
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:) yes. I will not forgot this issue. – Dec 07 '17 at 12:35
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1Wait, there might be help. See my A. – loki Dec 07 '17 at 12:49
1 Answers
16
You can rescue objects from drowning in the console with .Last.Value. See the following example.
sum(c(2,2,3,4))
#[1] 11
y <- .Last.value
y
#[1] 11
We learn from ?.Last.Value that
The value of the internal evaluation of a top-level R expression is always assigned to
.Last.value(inpackage:base) before further processing (e.g., printing).
This also works for functions:
function(x){
sqrt(x)
}
.Last.value
# function(x){
# sqrt(x)
# }
Interesting note from lmo in the comments:
As a side note, RStudio users can see this value in their environment panel by going to Tools > Global Options > General and then checking the box labelled "Show .Last.value in environment listing"
