Error using mesh z must be a matrix

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Anish Sundar Gowthaman
Anish Sundar Gowthaman il 14 Apr 2021
Commentato: Daniel Pollard il 15 Apr 2021
>> t=linspace(0,2,100);
>> x=t; y=t. ^2; z=t.^3;
>> plot3 (x,y,z), grid
>> t=linspace(–5,5,50); y=x;
>> z=–7./(1+x.^2+y.^2);
>> mesh(z)
  3 Commenti
Anish Sundar Gowthaman
Anish Sundar Gowthaman il 15 Apr 2021
@Daniel Pollard What corrections should I make ?
Daniel Pollard
Daniel Pollard il 15 Apr 2021
I don't know how to answer that when I don't know what the aim of your code is. Star Strider has left an answer - perhaps they figured out what you're after?

Accedi per commentare.

Risposte (1)

Star Strider
Star Strider il 14 Apr 2021
The arguments to ‘z’ need to be matrices in order for ‘z’ to be a matrix. Use ndgrid or meshgrid (linked to on that page) to create the matrices.
Try this:
t=linspace(0,2,100);
x=t;
y=t.^2;
z=t.^3;
figure
plot3(x,y,z)
grid on
t=linspace(-5,5,50);
y=x;
[X,Y] = ndgrid(x,y);
z= @(x,y) -7./(1+x.^2+y.^2);
figure
mesh(X,Y,z(X,Y))
.

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