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

[Christopher W Ryan]

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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