Hello,
A bit late but thanks for the extra explanation.
Rui Barradas
Às 16:00 de 16/09/2022, peter dalgaard escreveu:
As a general matter, empty arguments are allowed and are used meaningfully in some
contexts, notably A[i,], which is syntactic sugarcoating of "["(A,i,).
I.e., these are different:
"["(Sigma,2,) # 2nd row
[1] 0.077 0.168
"["(Sigma,2) # 2nd element
[1] 0.077
It is somewhat rare to have an empty last argument, intermediate ones are more
common:
seq(0,1,,5)
[1] 0.00 0.25 0.50 0.75 1.00
-pd
On 16 Sep 2022, at 16:33 , Rui Barradas <ruipbarra...@sapo.pt> wrote:
Hello,
Why doesn't the comma throw an error?
plot(1:5,) # works, no complaints
Shouldn't this be considered a bug? I would expect the parser to at least give
a warning.
sessionInfo()
R version 4.2.1 (2022-06-23 ucrt)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 22000)
Matrix products: default
locale:
[1] LC_COLLATE=Portuguese_Portugal.utf8 LC_CTYPE=Portuguese_Portugal.utf8
[3] LC_MONETARY=Portuguese_Portugal.utf8 LC_NUMERIC=C
[5] LC_TIME=Portuguese_Portugal.utf8
attached base packages:
[1] stats graphics grDevices utils datasets methods base
loaded via a namespace (and not attached):
[1] compiler_4.2.1
Rui Barradas
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