== Basics ==
* '''Octave version:''' Execute 'ver' in Octave and copy
it verbatim. If you are on Windows mention which build (MinGW, Cygwin, MXE, Visual Studio see http://wiki.octave.org/Octave_for_Microsoft_Windows) and where did you get it?
* '''Operating system:'''
** Windows: Is it XP 32bit or 64bit? Windows 7 or 8?
** GNU/Linux: Have you installed Octave using your package system (apt-get, yum..) or
* If you get a warning on startup, for example "warning: function xyz.m shadows a built-in function" please copy it verbatim
Please create a simple, as small as possible example which shows the problem so others can reproduce the problem
on their system and help you. Upload a screenshot (together with the script) if you can't describe it with words.
* Which toolkit are you using? Execute 'graphics_toolkit' in octave to query it. Common toolkits are 'fltk' or 'gnuplot'. Consider switching to another available toolkit (see available_graphics_toolkits) and try it there. You have to execute (for example switch to gnuplot) 'graphics_toolkit gnuplot' before any plotting command.