[texhax] include a pdf graphics file whose name includes a varying date

[David Carlisle]

\ifnum\thedatemonth<10 0\fi\thedatemonth

David

On 31 January 2017 at 22:33, Christopher W Ryan <cryan at binghamton.edu> wrote:
> I'm resurrecting a thread from back in October (month 10--two digits--this
> is of consequence).  My challenge was this:
>
> I am using R and Sweave and MikTeX on Windows 7.  I use this workflow
> to generate a recurring report quarterly. Same report, just new data.
>
> The R code generates a graph, saving it as a pdf file, the filename
> including the system date., like this:
>
> <timeseriesplot, results=hide, echo=FALSE>>=
> # make the major graph
> pdf(file=paste("
> NaloxoneUseEMS-timeseriesplot-", Sys.Date(), ".pdf",
> sep=""), height=8, width=12)
> ## bunch of R code in here to create a graph
> dev.off()
> @
>
>
>   Each time I run the report, the name of the saved pdf file changes, to
> match the system date. I want to include the
> most current graph in my pdf output.
>
> William Adams kindly provided this excellent solution:
>
> \documentclass{article}
>
> \usepackage{datenumber}
>
> \begin{document}
>
> NaloxoneUseEMS-timeseriesplot-\thedateyear-\thedatemonth-\thedateday
>
> \end{document}
>
>
> Which worked very well for a while.  But now that it is January (month 1, or
> 01, and there is the crux of the problem) it no longer does.  Here is part
> of the latex error message that provides a clue:
>
>
> ERROR: LaTeX Error: File `ERROR: LaTeX Error: File `ERROR: LaTeX Error: File
> `NaloxoneUseEMS-timeseriesplot-2017-1-31' not found.
>
>
> So it appears that the Latex package datenumber is searching for the
> graphics file called
>
>
> NaloxoneUseEMS-timeseriesplot-2017-1-31.pdf (which of course does not exist)
>
>
>
> whereas my R code is creating the graphics file called
>
>
> NaloxoneUseEMS-timeseriesplot-2017-01-31.pdf (which was successfully created
> and is sitting in the proper directory.)
>
>
> Can I make datenumber use 2 digits for \thedatemonth?
>
>
> Thanks.
>
>
> --Chris Ryan
>
>
>
>
>
>
>
>
>
> On Fri, Oct 14, 2016 at 3:15 PM, Christopher W Ryan <cryan at binghamton.edu>
> wrote:
>>
>> William--
>>
>> Fantastic! Thanks!
>>
>> --Chris
>>
>> On Fri, Oct 14, 2016 at 2:43 PM, William Adams <will.adams at frycomm.com>
>> wrote:
>> > \documentclass{article}
>> >
>> > \usepackage{datenumber}
>> >
>> > \begin{document}
>> >
>> > NaloxoneUseEMS-timeseriesplot-\thedateyear-\thedatemonth-\thedateday
>> >
>> > \end{document}
>
>
>
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