Re: [R] R-level expansion of Rplot%03d.png

[kees duineveld]

Not sure what you want. Plot does that automatically. It seems to use  
path.expand() to make the %03d expansion. Not that path.expand() is  
documented to do this, but it seem to work.

Kees
On Sat, 21 Aug 2010 13:04:54 +0200, baptiste auguie  
<baptiste.aug...@googlemail.com> wrote:

Dear list,

I'm using the brew package to generate a report containing various
plots. I wrote a function that creates a plot in png and pdf formats,
and outputs a suitable text string to insert the file in the final
document using the asciidoc syntax,

<%
tmp <- 1
makePlot = function(p, name=paste("tmp",tmp,sep=""), width=300)
{
png(paste(name,".png",sep=""))
print(p)
dev.off()
pdf(paste(name,".pdf",sep=""))
print(p)
dev.off()
cat(noquote(paste('image:',name,'.png["',name,'",width=',width,',link="',name,'.pdf"]',sep="")))
tmp <<- tmp + 1
}
%>

The resulting html file contains a thumbnail of the png file, with a
link to the pdf file.

I'm not happy with my default filename for the graphics. Is there a
way to expand the default filename of R graphic devices? I would like
to call it like this,


makePlot = function(p, name="Rplot%03d", width=300)
{

real.name = expandName(name) # function needed here
png(paste(name,".png",sep=""))
print(p)
dev.off()
pdf(paste(name,".pdf",sep=""))
print(p)
dev.off()
cat(noquote(paste('image:',real.name,'.png["',real.name,'",width=',width,',link="',real.name,'.pdf"]',sep="")))
}


Sincerely,

baptiste

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