How do I call a C or Fortran function or procedure from PyNGL?

For extending with C or C++, see Extending and Embedding the Python Interpreter. This page describes how to write modules in C or C++ to extend the Python interpreter with new modules. Those modules can define new functions but also new object types and their methods.

It also describes how to embed the Python interpreter in another application, for use as an extension language. See also SWIG. For extending with Fortran, see f2py.

€¢ How do I change the aspect ratio or size of my plot? You can use the viewport resources vpWidthF and vpHeightF. The viewport coordinates are normalized; that is, they take values from 0.0 to 1.0 (inclusive).

For example, if you want your plot to be twice as long as it is high, then you might set vpWidthF to 0.4 and vpHeightF to 0.8. Please note that in order to change the aspect ratio of a map projection, you must also set the resource mpShapeMode to "FreeAspect". For an example of changing the aspect ratio of a cylindrical equidistant map, see the PyNGL ... more.

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