I believe we are finally getting somewhere
By doing capabilities() in R I get:
jpeg png tcltk X11 aqua
http/ftp sockets libxml
TRUE TRUE TRUE TRUE FALSE TRUE TRUE TRUE
fifo cledit iconv NLS profmem cairo
TRUE TRUE TRUE TRUE FALSE FALSE
proving that my copy of R doesn't use cairo
Now to find a copy that does use cairo
Thanks
On Mon, Jun 16, 2008 at 4:01 PM, Barry Rowlingson
<[EMAIL PROTECTED]> wrote:
> Patrick Jackson wrote:
>
>> So it does look like it is the issue with Xwindows, but since I have R
>> version 2.7, why am I getting this error?
>
> Hmmm maybe I was a spot too hasty!
>
> The png() function can use either the Xlib or the Cairo back-end to make
> its file. If it is using Xlib then you need an Xserver, if it's using
> Cairo then you don't. My next guess is that your R doesn't have cairo
> capabilities.
>
> The 'capabilities()' function will tell you if it has cairo. png()
> should use it by default, so my assumption is you don't. I can get your
> error on a non-Xlib connection by doing png(file="foo.png",type="Xlib").
>
> You'll have to sort out a cairo-enabled version of R elsewhere - I'm
> pretty certain this isn't an Rpy problem (unless R running under Rpy
> isn't finding a cairo lib for some reason).
>
> So, see if interactive R has cairo capabilities. If it does, and png()
> is using it, then it might be an Rpy problem...
>
> Barry
>
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