On 29/12/2020 8:29 a.m., Rui Barradas wrote:
Hello,
R 4.0.3 on Ubuntu 20.10, session info at end.
Isn't the default value of argument drop missing in
?`[.data.frame`
Usage:
## S3 method for class 'data.frame'
x[i, j, drop = ]
I had the impression that it was TRUE (it is when running the function,
I'm talking about the docs).
No, you can see it if you print `[.data.frame`:
> `[.data.frame`
function (x, i, j, drop = if (missing(i)) TRUE else length(cols) ==
1)
So if you ask for specific rows and your dataframe has more than one
column, it defaults to FALSE.
I think the Rd checks allow you to leave out defaults, but don't allow
you to state them incorrectly, so that's probably why it is left as
blank in the Usage section, and explained in the Arguments section.
Duncan Murdoch
sessionInfo()
R version 4.0.3 (2020-10-10)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Ubuntu 20.04.1 LTS
Matrix products: default
BLAS: /usr/lib/x86_64-linux-gnu/blas/libblas.so.3.9.0
LAPACK: /usr/lib/x86_64-linux-gnu/lapack/liblapack.so.3.9.0
locale:
[1] LC_CTYPE=pt_PT.UTF-8 LC_NUMERIC=C
[3] LC_TIME=pt_PT.UTF-8 LC_COLLATE=pt_PT.UTF-8
[5] LC_MONETARY=pt_PT.UTF-8 LC_MESSAGES=pt_PT.UTF-8
[7] LC_PAPER=pt_PT.UTF-8 LC_NAME=C
[9] LC_ADDRESS=C LC_TELEPHONE=C
[11] LC_MEASUREMENT=pt_PT.UTF-8 LC_IDENTIFICATION=C
attached base packages:
[1] stats graphics grDevices utils datasets methods base
loaded via a namespace (and not attached):
[1] compiler_4.0.3 tools_4.0.3
Happy holidays,
Rui Barradas
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