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").
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").