On 11/02/2020 12:33 p.m., neonira Arinoem wrote:
Hi R gurus
Got an issue risen by CRAN about using unknown characters from Latex.
Here is the error message, in the context of PDF generated form manual pages
*Check: PDF version of manual, Result: WARNING LaTeX errors when creating
PDF version. This typically indicates Rd problems. LaTeX errors found:
! Undefined control sequence. <recently read> \blacktriangleright * >
* l.237 STRATUM $\blacktriangleright
$ LAYER\_3 ! Undefined control sequence. <recently read>
\blacktriangleright *
* l.239 PHASING $\blacktriangleright
$ RUN ! Undefined control sequence. <recently read> \blacktriangleright
*
* l.241 INTENT $\blacktriangleright
$ FEEDBACK*
I understand that the \blacktriangleright is an unknown control sequence
from latex ... and that sounds strange to me, as I uses it often in
vignettes without any issue so far.
I did some tests on my machine with R CMD Rd2pdf --force --output=x.pdf
man/*.Rd and it reproduces the issue.
In the incriminated manual page, the code generating this sequence is the
following
*\ifelse{latex}{\out{$\blacktriangleright$}}{\ifelse{html}{\out{▶}}{\u25b6}}*
Apparently I need to add the \usepackage{amssymb} to the manual page. Do
not know yet, how to achieve this.
As far as I know there's no way for you to do that. The fact you can do
it in vignettes isn't relevant: Rd files are in Rd format, which is not
LaTeX. Some LaTeX works when you put it in the \ifelse{latex} macro,
but there's no guarantee that it all will.
There's one exception to this warning: if you are building a package
for yourself, not for CRAN, you can put \usepackage{amssymb} into your
Rd.cfg file (somewhere on the LaTeX search path). See the R
Installation and Administration manual for details. I don't think
there's anywhere in your package you could include such a file.
Duncan Murdoch
Yours ideas and hints welcome and this point or any other solution to this
tricky issue.
I know that I can still change *\backtriangleright* with any available
control sequence and it will work. Indeed, not the way I prefer.
Really wish to get my *\blacktriangleright* display.
Best.
Neonira
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