Hi,

Following a question about the broken R module (R the statistical software), Aditya suggested me the filter module (thanks to him). I’m about to distribute a set of course notes to colleagues, and I need to deal with details now. I have one problem and two questions.

1) the filter collect R code between \startR / \stopR and submit this code to R. As it can be seen in the following minimal example, when a label contains an accented character (« Fréquence » in my example), the pdf graphic does not contains the « é ». Strangely, the snippet of code (which is saved locally as « test2-temp-R-0.tmp » (for test2.tex)) when submitted with the same command as the filtercommand, works correctly; that means the same file works when submitted to R outside of ConTeXt. I have no idea how to solve this.

2) In a teaching context, we may want sometimes to show the code. The filter module actually permits to show the output of the code submitted to R (which can include or not the input commands); would it be possible to typeset the submitted code ?

3) Finally, using "R CMD BATCH… » as the filtercommand add an extra line at the end of the output file which can be typeset to visualize results. Would it be possible by a magic trick to deleter the last line of the file ?

Here is a minimal code:

% —————————————————

\usemodule[filter]

\defineexternalfilter

[R]

[ filtercommand={R CMD BATCH -q --no-timing --save --restore \externalfilterinputfile\space \externalfilteroutputfile},

output=\externalfilterbasefile.out,

directory=output,

readcommand=\typefile,

read=no,

cache=yes,

purge=yes

]

\starttext

Some text...

\startR[read=yes]

pdf("RPlots/MyHistogram.pdf",5,5)

X <- rnorm(200,mean=10,sd=2)

hist(X, col = "red3" , xlab="Score QI" , main="", ylab="fréquence")

\stopR

\externalfigure[MyHistogram.pdf][width=.5\textwidth]

\stoptext

% —————————————————

Sorry for the three questions… and thanks for any help.

Fabrice.