Remove contour line from unwanted region

Question

K3iTH 2021-8-23

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1438889-remove-contour-line-from-unwanted-region

评论： Wan Ji 2021-8-23

Hi all, I am able to plot the contour at specific level. However, I want to remove/white out some contour lines from the unwanted region (between -1 to 1 for X and Z). I can create a white space for a 1D matrix (example from other user) with the code below but I have an issue with a matrix (360x180). The code below is not working for 2D matrix. I want to remove the all the contour line when X and Z is between -1 to 1. I have included my .mat file for X_2D,Z_2D and T_2D. Thank you for your kind response.

%%Example from other user
x = -100:100;
y = -100:100;
inputData = rand(201);
inputData(abs(x)<=10,abs(y)<=10) = nan;
contourf(x,y,inputData,'LineStyle','none');
%myCode
[M,c] = contour(X_2D,Z_2D,T_2D,1.025,'k');
c.LineWidth = 1;
xlabel('$x$','Interpreter','latex')
ylabel('$z$','Interpreter','latex')
axis equal
axis([-5 5 -5 5])
pbaspect([4 3 1])

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Answer 1

Wan Ji 2021-8-23

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1438889-remove-contour-line-from-unwanted-region#answer_772704

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%%Example from other user
x = -100:100;
y = -100:100;
inputData = rand(201);
inputData(abs(x)<=10,abs(y)<=10) = nan;
contourf(x,y,inputData,'LineStyle','none');
% myCode
T_2D(abs(X_2D)<1 & abs(Z_2D)<1) = NaN; %  remove the all the contour line when X and Z is between -1 to 1
[M,c] = contour(X_2D,Z_2D,T_2D,1.025,'k');
c.LineWidth = 1;
xlabel('$x$','Interpreter','latex')
ylabel('$z$','Interpreter','latex')
axis equal
axis([-5 5 -5 5])
pbaspect([4 3 1])