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Plots in MATCONT

When MATCONT is handled from the command line, then of course all MATLAB plot functionalities can be used. However, MATCONT provides two specific plot functions, namely `cpl.m` and `plotcycle.m`.

`cpl(x, v, s, e)` makes a two or three dimensional plot. This routine automatically places labels at the singularity points.The first three arguments must be the output of a continuation run. The fourth argument `e` is optional. `e` is an array whose elements define which coordinates of the system are used. Therefore `e` must have either 2 components (2D-plot) or 3 components (3D-plot). If e is not given and `x` has 2 (respectively 3) components, then a 2D-plot (3D-plot,respectively) is drawn. In all other cases an error message will be generated.

The use of `plotcycle` is discussed in §7.3.