Fix the trace in the plot
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Is there a way somehow to get rid off the cross-line in this traces? For some reason,I am getting this cross-line that I do not want to! Any suggestions? Thanks
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Star Strider
le 6 Fév 2016
Without your data, it’s difficult to say. One way would be to delete the last element of each of your x and y vectors:
x = [1:10 1];
y = randi(9, 1, 10);
y = [y y(1)];
figure(1)
subplot(2,1,1)
plot(x, y) % Original Data
subplot(2,1,2)
plot(x(1:end-1), y(1:end-1)) % Delete Wrap-Around
Run this little code snippet to see the cause and effect of the change.
4 commentaires
Star Strider
le 7 Fév 2016
Please upload your data, preferably as a .mat file. Without having it to work with, I can only guess as to what the problem is (and thus far, that doesn’t seem to be productive for either of us).
Use the ‘paperclip’ icon to upload it, and then complete both the ‘Choose file’ and ‘Attach file’ steps.
Geoff Hayes
le 6 Fév 2016
sally - I suspect that if you are plotting something similar to
plot(x,y)
then some of your x values are out of order (i.e. 5000,5001,6799,6800,5002,5003,etc). For example, if I want to plot the curve
y = x^2;
where x is defined as
x = linspace(-25,25,1000);
which I then re-arrange (or sort out of order) the x values as
x = [x(251:end) x(1:250)];
I will observe the following upon plotting
y = x.^2;
plot(x,y)
I get the same "cross-line" as you! To correct, you can try to sort the x and y values as
data = sortrows([x' y']); % sort on first column
x = data(:,1);
y = data(:,2);
plot(x,y);
which should plot as expected without the undesirable line.
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