How do I do this?

2021 2 9
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更新时间：2021 2 9
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Plot region bounded above by the paraboloid z = x2 + y2 and below by the triangle enclosed by the lines y = x, x=0, and x + y =2,

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Walter Roberson
Walter Roberson 2021-2-9
Symbolic toolbox and piecewise() and fsurf()
JIANGWEN DONG
JIANGWEN DONG 2021-2-9
Can you tell me how do write the code, please?
[x,y] = meshgrid(linspace(-2,2));
z = x.^2+y.^2;
mesh(x,y,z)
hold on;
I only work this out.
Walter Roberson
Walter Roberson 2021-2-9
Ran in:
Ran in:
[x,y] = meshgrid(linspace(-2,2));
z = x.^2+y.^2;
z(x + y > 2) = nan;
mesh(x,y,z)
Except you would insert more statements setting selected z locations to nan.
JIANGWEN DONG
JIANGWEN DONG 2021-2-9
oh thank you very much!
What about the other two lines?
Walter Roberson
Walter Roberson 2021-2-9
you would insert more statements similar to
z(x + y > 2) = nan;
JIANGWEN DONG
JIANGWEN DONG 2021-2-9
OK
thank you very much!

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