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Generating figures with matplotlib when DISPLAY variable is undefined or invalid
When running the "metaplots" or "plot_orf_density" command, some users received errors similar to the following:
"raise RuntimeError('Invalid DISPLAY variable')" _"tkinter.TclError: no display name and no $DISPLAY environment variable"
The main problem is that default backend of matplotlib is unavailable. The solution is to modify the backend. A very simple solution is to set the MPLBACKEND environment variable, either for your current shell or for a single script:
export MPLBACKEND="module://my_backend"
Giving below are non-interactive backends, capable of writing to a file:
- Agg
- PS
- SVG
- Cairo
- GDK
See also: http://matplotlib.org/faq/usage_faq.html#what-is-a-backend http://matplotlib.org/users/customizing.html#the-matplotlibrc-file http://stackoverflow.com/questions/2801882/generating-a-png-with-matplotlib-when-display-is-undefined