在Matlab中以相同颜色绘制恒定轮廓 [英] Ploting constant contours in the same color in matlab

问题描述

[x,y] = meshgrid(-10:1:10,-10:1:10); 
idx = (x~=0)&(y~=0);     
contour(x(idx)/(x(idx).^2+y(idx).^2).^(3/2),y(idx)/(x(idx).^‌2+y(idx).^2).^(3/2))‌​;

输出为白页！

推荐答案

删除"您不想要的点:

[x,y] = meshgrid(-10:0.1:10,-10:0.1:10);
Idontwantthis = (x.^2+y.^2)<1;
data= x./(x.^2+y.^2).^(3/2)+y./(x.^2+y.^2).^(3/2);
data(Idontwantthis)=NaN;
contourf(data,20);

请注意，我将/替换为./

我还添加了更多点，因为您的网格很小.

I also added more points, as your meshgrid is tiny.

如果使用contourf而不是contour(同样的东西，看上去更好)，结果将是这样的:

This is what the result looks like if you use contourf instead of contour (same thing, nicer looking):

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