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Plotting the output of a continuation of limit cycles

A continuation run of limit cycles has the standard form

`[x,v,s,h,f]=cont(@limitcycle,x0,v0,opt);`

Here `x` is a matrix in which each column corresponds to a computed orbit. The last element of each column contains the value of the active parameter. CL/SMALL>_MATCONT provides only limited possibilities to visualise the output. Namely, it provides the routine `plotcycle.m` which is to be called in the form

`plotcycle(x,v,s,e)`

where `e` is either a two- or a three-dimensional row vector.

- If `e=[e1,e2]` one must have and a 2D plot will be generated in which the projections of the orbits on the coordinate plane are shown. The first and last curves, and the curves with singulaties are in red.
- If `e=[e1,e2,e3]` then `e1` must be the index of the active parameter, i.e. `e1=size(x,1)` and one must have Then a 3D plot will be generated in which the projections of the orbits on the coordinate plane are shown versus the active parameter. The first and last curves, and the curves with singulaties are in red.