Delete specific contour line from contour plot
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I have made a contour plot, due to some reason unknown to me, there is one abnormality in the graph. One contour line is out of order, and I want to delete it. Kindly if someone can help or guide me to get rid of the contour line with ‘0’ markings. I am using the following code:
contour(X,Y,M,'ShowText','on');
here M is a matrix of size 
and X & Y are also matrices of same size and obtained as
and X & Y are also matrices of same size and obtained as [X,Y]=meshgrid(x,y);
Following is the output
I am not an expert in MATLAB, maybe that's the reason I am unable to figure out the cause for the occurrence of this contour line. I’ve also attached the data matrix for this code.
Thanks a lot for your help.
采纳的回答
Bjorn Gustavsson
2019-4-5
It is not obvious to me which contour you want to remove, but if you don't want, for example the 0-level contour you do:
contour(X,Y,M,[0.1:0.1:1])
If it is some other contour you need to purge you might have to be a bit more hands-on:
[Qc,Hc] = contour(peaks(123));
Hcc = get(Hc,'children'); % Handles to the contour segments at least in my matlab-version
delete(Hcc(4)) % If the fourth contour-segment is the offending one...
HTH
更多回答（1 个）
You can read about the option of LevelList in the countour. YOu can provide only those levls which you want to plot. Read more in contour function.
In your case this should work:
contour(X,Y,M,'LevelList',0.1:0.1:9,'ShowText','on');
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