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2020-10-11 03:39:51 +0200	answered a question	How to set the matplotlib backend used by plot() Thank you, @Sébastien. From your comment and documentation references, it seems clear that: The `%matplotlib` is an IPython-only mechanism; and SageMath's command-line IPython backend currently doesn't support `matplolib` GUI. The second conclusion comes from the reported by `get_display_manager().supported_output()`: `frozenset({..., <class 'sage.repl.rich_output.output_graphics.OutputImageDvi'>, <class 'sage.repl.rich_output.output_graphics.OutputImageGif'>, <class 'sage.repl.rich_output.output_graphics.OutputImagePdf'>, <class 'sage.repl.rich_output.output_graphics.OutputImagePng'>, ...})` The only other output types for 2D images defined in Sage's library are for JPEG and SVG files. Not a single mention to `matplotlib` GUI backends. It would be necessary to define a new output type class in order to use it natively in Sage, although it doesn't seem too hard to implement. For now, I'll live with the `Graphics2d` to `matplotlib` object conversion!
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2020-10-09 02:55:45 +0200	asked a question	How to set the matplotlib backend used by plot() SageMath uses `matplotlib` as its graphics engine and the module itself can work with many backends. But how can I set a GUI matplotlib backend to be used by the `plot()` function and its friends, at least in the command-line interface? And is there a way to set a default backend? In my setup, `plot()` doesn't respect the backend set by the `%matplotlib` magic, but `matplotlib.pyplot.plot()` does. Even worse, the default backend creates a PNG image file and opens it in the system's viewer. I'm on macOS 10.13 "High Sierra" running SageMath 9.1, the binary app version.