plot 2 curves with 'very close' y values

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Sam Alex
Sam Alex 2012-12-22
Hello,
I would like to know if there is a way in matlab to plot 2 curves on the same plot, that have very close y values (very small differences).
Note: I have tried the 'log' for the y-scale but gave a similar view as the linear!
Thanks

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Azzi Abdelmalek
Azzi Abdelmalek 2012-12-22
编辑：Azzi Abdelmalek 2012-12-22
plot(t,y1,'or)
hold on
plot(t,y2,'-g')
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Walter Roberson
Walter Roberson 2012-12-22
Okay, so they get similar and interleaved, and that is a problem because... ? And what would your output look like ideally?
Sam Alex
Sam Alex 2012-12-22
Thanks Azzi. You are an A++ expert!

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José-Luis
José-Luis 2012-12-22
编辑：José-Luis 2012-12-22
If you want to see the differences and at the same time keep values of your vectors, i would recommend something like this:
plot(x1d,x2d,'b-'); %your values
hold on;
plot([0 3],[0 3], 'k-'); % 1:1 line
So you have both your vectors in the x and y axes, and the diagonal line shows points of equal value. Below the diagonal one is greater than the other. Vice-versa for above. The further away, the larger the difference.
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Sam Alex
Sam Alex 2012-12-22
Thank you so much. You are wonderful!
José-Luis
José-Luis 2012-12-22
Not sure about that, but I'm glad I could help.

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John D'Errico
John D'Errico 2012-12-22
So why not just plot the difference?
Or create two plots as a subplot, one with just curve 1, and the second as the difference between the two curves?
Or, have both plots on the same set of axes, with a double y axis?
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