<[EMAIL PROTECTED]> writes:
> Below are 2 scripts (png.R and pdf.R) I am trying to run in R from
> PHP.
>
> # png.R
> x11(display=":5")
> png(filename="g.png")
> plot(1:5)
> graphics.off()
>
> # pdf.R
> pdf(file="g.pdf")
> plot(1:5)
> graphics.off()
>
> Both run from terminals and png.R will run without a normal X server
> if Xvfb is running. Neither runs under PHP, though (when invoked as
> "R --no-save < xxx.R"). They yield the following errors (with the R
> startup banner deleted for compactness):
>
> > x11(display=":5")
> > png(filename="g.png")
> Error in X11(paste("png::", filename, sep = ""), width, height, pointsize, :
> unable to start device PNG
> In addition: Warning message:
> could not open PNG file `g.png'
> Execution halted
>
> and
>
> > pdf(file="/usr/pkg/share/httpd/htdocs/test-R/g.pdf")
> Error in PDF(file, old$family, old$encoding, old$bg, old$fg, width, height, :
> unable to start device pdf
> In addition: Warning message:
> cannot open `pdf' file argument `/usr/pkg/share/httpd/htdocs/test-R/g.pdf'
> Execution halted
>
> For reference, the R banner information includes the following:
>
> R : Copyright 2003, The R Development Core Team
> Version 1.6.2 (2003-01-10)
>
> Any help on how to get these scripts to work is greatly appreciated.
Your R version is about a year out of date, but that's hardly the
issue. I don't do PHP, but the error message in both cases has to do
with file opening, so how about checking permissions on your current
directory: Try sticking this into your script
system("id; pwd; ls -la")
Also notice that web applications often take special security measures
and may change one or all of the following: working directory, root
directory, user id, and group id.
--
O__ ---- Peter Dalgaard Blegdamsvej 3
c/ /'_ --- Dept. of Biostatistics 2200 Cph. N
(*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918
~~~~~~~~~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907
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