On 05/04/2012 08:06 AM, Robert Dodier wrote:
> On 2012-05-03, Bart Vandewoestyne<Bart.Vandewoestyne at telenet.be> wrote:
>
>> Unfortunately, this fails. I get the error:
>>
>> (%i18) plot2d(float(abs(Gm(s))),[s,0.1,1000.0])
>> Maxima encountered a Lisp error:
>> Couldn't write to #<SB-SYS:FD-STREAM for "descriptor 9" {10061923A1}>:
>> Broken pipe
>
> Your example bartfile.mac works OK for me. I am working w/ Maxima 5.26.0
> and approximately 5.27.0 (built from Git) on Linux.
>
> I suspect the broken pipe means that Maxima failed to launch Gnuplot (so
> there is nobody to listen to the plotting commands Maxima wants to
> send). By default the plot format is gnuplot_pipes; try
>
> set_plot_option ([plot_format, gnuplot]);
>
> (writes a file instead of opening a pipe), or
>
> set_plot_option ([plot_format, openmath]);
>
> Openmath format uses a Tcl/Tk widget.
>
> By the way, can you launch gnuplot from the command line?
> (Maybe Gnuplot is not installed on your system?)
>
> Hope this helps,
>
> Robert Dodier
Hello Robert (and list),
In the meanwhile, I also figured out that there was a problem with my
gnuplot install. Because I'm working on an older Red Hat linux distro,
the packaged gnuplot is quite old and I had compiled a more recent one
myself. Apparently, I couldn't start gnuplot from the command-line
either... so that's why I got the error. After switching back to the
packaged version instead of my own compiled version, the plots now work.
Kind regards,
Bart