It's clear some people simply need and want this, even though from a plotting point of view it is slightly ambiguous as it concerns just a single value for the state (and max=min). This can be achieved through the following change: In file GUI\CLContOutputInterpreter.m Add the following lines 120,121 plotsel.declareItem('coordinates', coordinates{index}, 'Max', sprintf('max(%s)', coordinates{index}), @(x, h, f, s, ind, i)x(index, ind)); plotsel.declareItem('coordinates', coordinates{index}, 'Min',...
The error suggests you use the symbol x in your code but you do not give it a value. However, without the model specification we cannot be sure. Good luck debugging.
The tutorial also shows what to plot, and the documentation explains what these continuation variables mean.
Hmm... As the tutorials were fine for you, nothing seems strange. But without details to reproduce this error, it's too hard to see what's happening.
Such post-processing for paper-quality figures one could better do separately. Data for all curves are saved into mat-files in a folder Systems/diagram/ The manual and tutorial show you how to make the plot, and then you can edit this to your preference.
On the left, your system reads as M dy/dt with y=(a1,b1,a2,b2) and a matrix M, so it is completely coupled. In the syntax we really expect a1'=.... b1'=.... and so on, in that order, that's what the error message refers to. You could still apply the inverse of M to both sides to arrive at that form.
Here we discuss issues with the software, not the use, one should do research themselves. And perhaps the finishing remarks in that document need to be spelled out explicitly: 1. My first concern is that the response for a 2DOF-system is not purely periodic, but more likely it's a torus. Continuation will not help you as continuation of tori is not supported, so you may be better of with long time simulations. (In contrast to the 1DOF-oscillator mentioned in the tutorial). 2. My second concern is...
Apply the procedure as above, rewrite your equations first to a system of first-order ODEs.