plot function does not work with gnuplot (easyviz)

[Martin Lutz]

Example code:

from scitools.std import *
t=linspace(0, 1, 100)
y=t
plot(t, y)

Error message:

Traceback (most recent call last):
  File "easyviz.py", line 4, in <module>
    plot(t, y)
  File "/usr/lib/pymodules/python2.7/scitools/easyviz/common.py", line 3136, in plot
    self._replot()
  File "/usr/lib/pymodules/python2.7/scitools/easyviz/gnuplot_.py", line 1161, in _replot
    self._g.reset()
  File "/usr/lib/python2.7/dist-packages/Gnuplot/_Gnuplot.py", line 367, in reset
    self('reset')
  File "/usr/lib/python2.7/dist-packages/Gnuplot/_Gnuplot.py", line 211, in __call__
    self.gnuplot(s)
  File "/usr/lib/python2.7/dist-packages/Gnuplot/gp_unix.py", line 210, in __call__
    self.flush()
IOError: [Errno 32] Broken pipe

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: python-scitools 0.9.0-1
ProcVersionSignature: Ubuntu 3.5.0-27.46-generic 3.5.7.7
Uname: Linux 3.5.0-27-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.6.1-0ubuntu10
Architecture: amd64
Date: Sun Apr 14 17:50:38 2013
InstallationDate: Installed on 2011-10-21 (541 days ago)
InstallationMedia: Xubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: scitools
UpgradeStatus: Upgraded to quantal on 2012-11-11 (154 days ago)

[Johannes Ring (johannr)]

Try to start gnuplot from the command line and then run "test". Does that give you a plot? If not, try to install the gnuplot-x11 package. That should make gnuplot and scitools work as expected.

I'm not sure if this is a bug in python-scitools or python-gnuplot, but I lean towards the latter.

[Martin Lutz (m-lutz)]

I now see that this was the only computer without installed "gnuplot-x11" (instead there was "gnuplot-nox"). After the correct installation, everything works fine.

(I don't know whether this dependency problem belongs to "python-scitools" or "python-gnuplot").