How to stop extraneous lines when using 'mesh'?

2014 3 19
2 个回答
更新时间：2014 3 19
5 次查看（30 天）

0 个投票

Hi,
I am having problems with the 'mesh' command (see picture below). The command is inserting lines that are not part of the surface under consideration (hyperbolic paraboloid in this case). Is there a way of stopping this happening?
Thanks
Nic
P. S. Interestingly when this is converted to a *.jpeg the extraneous lines disappear.

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回答（2 个）

Mischa Kim
Mischa Kim 2014-3-19

0 个投票

Does this help?
x = -1:0.1:1;
y = -1:0.1:1;
[X,Y] = meshgrid(x,y);
Z = power(Y,2) - power(X,2) - 0.5;
mesh(X,Y,Z)
box

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Mischa Kim
Mischa Kim 2014-3-19
OK. Try to see if changing the renderer does the trick:
set(gcf, 'Renderer', 'OpenGL');
or
set(gcf, 'Renderer', 'zbuffer');
Alternatively, check
set(gcf,'EdgeAlpha',0.99)

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Nic Roberts
Nic Roberts 2014-3-19
编辑：Nic Roberts 2014-3-19

0 个投票

No that just puts a box around it, but the extra lines are still there.
The code I used was,
[x,y]=meshgrid(-1:0.1:1);
a=-3;
b=1;
z=0.5*(a*x.^2 + b*y.^2);
mesh(x,y,z);

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