Please tell me how to erase meaningless lines from graphs!

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장훈 정
장훈 정 2022-9-6
回答： Star Strider 2022-9-6
In the graph above, I want to erase the line that crosses pi at -pi, how can I do it?
I wasn't there originally... It's a simple question, but I can't solve it.
plot(data(:,1),data(:,2))
xlim([-pi pi])
xticks(-pi:pi/2:pi)
xticklabels({'-\pi','-\pi/2','0','\pi/2','\pi'})
pbaspect([ 1 1 1])
grid on
xlabel('rad')
ylabel('mm')

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采纳的回答

Dyuman Joshi
Dyuman Joshi 2022-9-6
编辑：Dyuman Joshi 2022-9-6
Ran in:
There is repetition in your data, 1st and Last row are the same.
%plot upto 2nd last row
plot(data(1:end-1,1),data(1:end-1,2))
xlim([-pi pi])
xticks(-pi:pi/2:pi)
xticklabels({'-\pi','-\pi/2','0','\pi/2','\pi'})
pbaspect([ 1 1 1])
grid on
xlabel('rad')
ylabel('mm')

更多回答（1 个）

Star Strider
Star Strider 2022-9-6
Ran in:
There is no need to discard any data. Just use sortrows to sort them —
LD = load(websave('data','https://www.mathworks.com/matlabcentral/answers/uploaded_files/1117765/data.mat'));
data = LD.u;
data = sortrows(data,1);
plot(data(:,1),data(:,2))
xlim([-pi pi])
xticks(-pi:pi/2:pi)
xticklabels({'-\pi','-\pi/2','0','\pi/2','\pi'})
pbaspect([ 1 1 1])
grid on
xlabel('rad')
ylabel('mm')
The ‘wrapped’ lines are almost always solved by sorting.
.

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