How can i write correct this function?

I can't write this function in order to be correct and make its graphic in mesh. Please help me.

Answer 1

[V B]

Answer 2

[Star Strider]

This is how I would do it:

x = linspace(0,pi);
y = linspace(-1,1);

[X,Y] = meshgrid(x,y);

z = @(x,y) sin(x-2.*y).^2 .* exp(-abs(y));

Z = z(X,Y);

figure(1)
mesh(X, Y, Z)
grid on

[V B]

thank you!!

[Star Strider]

My pleasure!