The code for plotting graphs is considered the frontend in Matplotlib's terminology. We first mentioned backends in Chapter 1, Introduction to Matplotlib, when we were talking about output formats. In reality, Matplotlib backends have much more differences than just support for graphical formats. Backends handle so many things behind the scenes! And that would determine the support of plotting capabilities. For example, the LaTeX text layout is supported only by Agg, PDF, PGF, and PS backends.
We have been using several non-interactive backends so far, which include Agg, Cairo, GDK, PDF, PGF, PS, and SVG. Most of these backends work without extra dependencies, but Cairo and GDK require the Cairo graphics library or GIMP Drawing Kit, respectively, to work.
Non-interactive backends can be further classified into two groups—vector or raster. Vector graphics describe images in terms of points, paths, and shapes that are calculated using mathematical...
