Matrix is singular to working precision. Meshgrid

2021 3 18
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更新时间：2021 3 18
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[x,y] = meshgrid(0.1:0.01:1,0.1:0.01:1);
z = ((1-x)*(cos(2*pi*y+(pi + atan((cos(2*pi*y)-1)/(2*pi*(1-y)+sin(2*pi*y)))))-...
cos(pi + atan((cos(2*pi*y)-1)/(2*pi*(1-y)+sin(2*pi*y))))))/((1-y)*(cos(2*pi*x...
+(pi + atan((cos(2*pi*x)-1)/(2*pi*(1-x)+sin(2*pi*x)))))-cos(pi + atan((cos(2*pi*x)-1)/(2*pi*(1-x)+sin(2*pi*x))))));

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Rik
Rik 2021-3-18
编辑：Rik 2021-3-18
Ran in:

0 个投票

Ran in:
You aren't using elementwise operations anywhere. You should replace every * by .* and every / by ./, that way you will not be doing matrix operations.
[x,y] = meshgrid(0.1:0.01:1,0.1:0.01:1);
z = ((1-x).*(cos(2*pi*y+(pi + atan((cos(2*pi*y)-1)./(2*pi*(1-y)+sin(2*pi*y)))))-...
cos(pi + atan((cos(2*pi*y)-1)./(2*pi*(1-y)+sin(2*pi*y))))))./((1-y).*(cos(2*pi*x...
+(pi + atan((cos(2*pi*x)-1)./(2*pi*(1-x)+sin(2*pi*x)))))-cos(pi + atan((cos(2*pi*x)-1)./(2*pi*(1-x)+sin(2*pi*x))))));
surf(x,y,z),view(45,30)

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