How can I plot a curve while changing color every N points ?

Question

Ilan Boulet 2022-7-26

0
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https://ww2.mathworks.cn/matlabcentral/answers/1768020-how-can-i-plot-a-curve-while-changing-color-every-n-points

编辑： Jon 2022-7-26

Hello !

I am working on a code to plot my datas. Thoses datas are measurements of N cycles, each have 162 points. The thing is that my ouput is one .txt file of N*162 lines. I can plot those but I am struggling to find how I can associate a different color every 162 points (and in my dreams those colors are also a gradient so we can see the evolution clearly). I tried to do it as a for loop :

C=() %Here I should put something to sweep a gradient color range but I have nonn clue what can I put 
L=linspace(-40,40,PpC/2); %PpC is an input which refers to the number of points per cycle, so 162
figure
for j=1:NdC % NdC is an input  which refers to the number of cycles in the experiment, what I called N just before 
    plot(L,mapcomplete,'color',C(j))
end

Obvisouly this doesn't work but I just would like to give you the path I am working on.

Also I link an example of .txt file I use if it might help.

Thank you a lot !!

I.

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Answer 1

Jon 2022-7-26

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https://ww2.mathworks.cn/matlabcentral/answers/1768020-how-can-i-plot-a-curve-while-changing-color-every-n-points#answer_1015230

编辑：Jon 2022-7-26

在 MATLAB Online 中打开

I was coding up the example below, and by the time I posted I saw you already had an answer from @Cris LaPierre. I will still include mine in case it provides you with any further ideas. I had understood that you wanted a seperate curve for each cycle, each with a different color, rather than just one curve with the colors changing as @Cris LaPierre shows.

% make some example data

numCurves = 30;

x = linspace(0,100,50)';

Y = x*linspace(0,25,numCurves);

% make color map

colors = jet(numCurves); % could use others, e.g csv, winter etc

% plot curves

figure

hold on

for k = 1:numCurves

plot(x,Y(:,k),'Color',colors(k,:))

end