How can I overlap multiple lines on one plot in an iterative loop?

Hello All,

I am having trouble overlapping multiple line graphs on the same axis. Currently, I am getting a graph for each iteration rather than a combination of all the graphs in one. An example of the code is shown below.

r = (1:10);
for i = 1:1:10
    n = r(1,i);
    t = num2str(n);
    d = csvread(['data_',t,'.csv']);
    p = d(:,3);

    figure (), title ("Power");
    plot(p,'g'),xlabel("Time"),ylabel("Power");
    hold on
end

I have tried to store the values for each iteration, like this, but then I recieve error messages: "nonconformant arguments (op1 is 1x1, op2 is 1x4)".

r = (1:10);
for i = 1:1:10
    n(i) = r(1,i);
    t(i) = num2str(n(i));
    ...
end

Any help would be appreciated. Thanks in advance.

Answer 1

[Chunru]

• take the statement "figure()" just before the loop so that all plots are on the same figure
• the plot command "plot(p, 'g') should better include variable t so that all plots have meaningful x-axis;
• remove 'g' so that matlab cycle the default colors for each subsequent plot (if this is what you deire)

[Bobby DeCoursey]

This fixed it. Thank you!