how to change line colors in bodes, nichols, nyquist, etc

I've been trying to change the line colors when plotting 30+ systems and it seems like the routines creating the plots in the title are not using the color order in the gca/axis. When I've accessed the handle through following code it seems like there are still a fixed number of colors available, ~6-7

h.Responses(n).Style.Colors{1} =

h.Responses(n).Style.setstyle

When I start adding more lines and setting the colors then all the previous linecolors are also changed, like a circular buffer of some sort is in use. I've just been trying to a jet and it works for 7 or so lines & colors, but does not work for a number like 30+ unique systems

Answer 1

[Image Analyst]

See attached demo for how to change the default color order.

[Stephen Reiman]

Line 79 from the demo did appear to work with lines added using the plot function

Line 79: set(gca, 'ColorOrder', newDefaultColors, 'NextPlot', 'replacechildren');

As stated, observed behaviors in nicholsplot, bodeplot, & nyquistplot are that they are not using the same color order.

The code included in the original question implents the solution from the link below, but broke down as the number of systems being drawn increased.

https://www.mathworks.com/matlabcentral/answers/151514-how-can-i-define-my-own-colororder-for-a-bodeplot

[Image Analyst]

Sometimes you can edit the code and change things. Other times, not, as the m-file calls a mex function.

>> edit nicholsplot.m

See if that gets you anywhere.

Answer 2

[Paul]

I tested stepplot and bodeplot and am seeing the same thing as you, i.e., if more than 7 responses, then multiple responses are linked together somehow and share the same color. Don't know why it's set up that way and couldn't find a way to change it, but as far as I can tell it's all undocumented behavior so can't really expect anything.

As a work around, you can use plain old bode() and step() and get the handles to the lines and change colors at will, so it seems to me.

[Stephen Reiman]

After poking around at the m-files as recommended I did settle on a solution.

I ended up implementing a color change per my original post for the 1st system and using the returns from bode, nichols, & nyquist with "line" for additional ones. Memory usage went down substantially.