> Henrik Bengtsson
> on Tue, 24 Sep 2019 11:42:13 -0700 writes
[to me (as maintainer of 'Matrix') and allowed me to answer in public] :
> I ran into a problem where 'R CMD check' on my in-house package, which
> only indirectly depends on 'Matrix', produce errors like:
>
> [where=, w
Dear Michael,
I think R-devel mailing list is not a proper place to report issues
with devtools. I would try filling an issue in their github
repository.
If you are able to reproduce this issue using plain R without any
extra packages, then please provide such example here.
Regards,
Jan Gorecki
This question was posed on SO :
https://stackoverflow.com/questions/58118495/passing-extra-argumenets-to-devtoolsbuild
but there has been no useful reply.
Something seems to have changed in the |devtools|package, so that the
following commands, that used to run now give an error I can't deciph
Yes, you can manipulate the language object, and replace the the 1:10
with its own 5. element, and then call eval on the modified
expression. This can be simple if you know the structure of the
expression well, and difficult otherwise.
It goes like this:
SEXP lang_test(SEXP expr, SEXP idx, SEXP i
You may be trying to do something similar to hutilscpp::which_first(x < 5)
which does most of its work at the R level. That is notice an expression is
of the form lhs operator rhs then evaluate each element of lhs separately
On Fri, 27 Sep 2019 at 8:35 pm, Morgan Morgan
wrote:
> Hi,
>
> I am
Hi,
I am wondering if the below is possible?
Let's assume I have the following expression:
1:10 < 5
Is there a way at the R C API level to only evaluate the 5th element (i.e 5
< 5) instead of evaluating the whole expression and then select the 5th
element in the logical vector?
Thank you
Best r
