How to create one plot with multiple lines in a for loop?

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Hello,
I have been trying to create a plot, with an unknown number of lines. Each should be on the same graph, and a different colour. However, I am only getting one line on my graph.
This is my code currently:
y = cell(numFiles,1) ;
x = [30:10:100]
figure();
hold on
for k = 1:numFiles
%Code that generates data
y{k} = [h g f e d c b a ]
plot(x,y{k}, 'Color', [rand,rand,rand])
end
title('SNR / Index')
hold off
What am I doing wrong? Thank you!

Accepted Answer

Jan
Jan on 27 May 2021
x = 30:10:100;
figure();
% axes('NextPlot', 'add'); % Same as: hold on
hold on
for k = 1:8
y{k} = rand(size(x));
plot(x, y{k}, 'Color', rand(1, 3))
end
You see, it works with hold('on') or with creating the axes explicitly also.
Are you sure, that this is your code and there is no cla anywhere?
  5 Comments
Jan
Jan on 28 May 2021
The debugger is the best friend of the programmer.

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