plot 2 curves with 'very close' y values
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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
采纳的回答
Azzi Abdelmalek
2012-12-22
编辑：Azzi Abdelmalek
2012-12-22
plot(t,y1,'or)
hold on
plot(t,y2,'-g')
17 个评论
Walter Roberson
2012-12-22
plot(t, y1, 'or', t, y2, '-g')
Sam Alex
2012-12-22
Image Analyst
2012-12-22
Maybe you want to, or should, plot the difference instead of the value themselves.
Sam Alex
2012-12-22
Azzi Abdelmalek
2012-12-22
编辑：Azzi Abdelmalek
2012-12-22
What do you want exactly to plot? post your two functions
Sam Alex
2012-12-22
Azzi Abdelmalek
2012-12-22
Post a link that contains your file
Image Analyst
2012-12-22
编辑：Image Analyst
2012-12-22
Have you maximized the height of your axes? To as much as full screen or close to it?
Azzi Abdelmalek
2012-12-22
add to your plot
set(gca,'xscale','log')
Image Analyst
2012-12-22
Sorry - Windows doesn't support proprietary .rar files.
Sam Alex
2012-12-22
Azzi Abdelmalek
2012-12-22
It's not the same plot
Walter Roberson
2012-12-22
You have not really defined your goal. You know how to plot two lines on the same plot, so you must be talking about something you want to do with the presentation of the lines, but you have not defined what you want the result to be.
Sam Alex
2012-12-22
Azzi Abdelmalek
2012-12-22
编辑：Azzi Abdelmalek
2012-12-22
The variation becomes too small, you have to make several plots in many intervals to see these variations
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
2012-12-22
更多回答（2 个）
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.
6 个评论
Sam Alex
2012-12-22
José-Luis
2012-12-22
Edited code: I was not plotting a line but points, please look at my updated answer.
Sam Alex
2012-12-22
José-Luis
2012-12-22
Not like that, but plotmatrix() could help you for that.
Sam Alex
2012-12-22
José-Luis
2012-12-22
Not sure about that, but I'm glad I could help.
John D'Errico
2012-12-22
0 个投票
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?
help plotyy
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