Mismatched plot when editing the x-axis

Question

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This is the code I ued when opening a plot in matlab command from simulink.

plot(out.x(:,1), out.x(:,2), out.x(:,1), out.x(:,3), out.x(:,1), out.x(:,4))

The x-axis runs from 0-100, which I want to change to 1960:1.49:2060

I used

timedata=1960:1.49:2060;

so that they cover the same length.

plot(timedata, out.x(:,2), timedata, out.x(:,3), timedata, out.x(:,4));

I am not sure why there is a difference between the two graph? There shouldn't be apart from the x-axis.

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Ameer Hamza 2020-4-6

Can you share the variable 'out' in a .mat file?

I have attached the file.

Answer 1

Walter Roberson 2020-4-6

0 个投票

out.x(:,1) is not evenly spaced. Plot it by itself and you will see. Or look at diff(out.x(:,1))

Walter Roberson 2020-4-6

x1 = out.x(:,1) + 1960;
plot(x1, out.x(:,2:4));

Yes, that has sorted it. Thank you.