how to get this right?

x = rand(30) * 25;
y = rand(30) * -28;

z = complex(x, y);

Z=ifft2(z);
Z = ifft2(y,8,8);
Z=size(Z);

is it possible to convert 2 D matrix into 3 D matrix ?

once i get 3D matrix

then

A(a,b,c)=Z

a=(x^2+y^2+2*z)/2*x;

so now i want Z terms which is in Z(x,y,z) terms into A(a,b,c)

2021a version

[Walter Roberson]

Z=ifft2(z);
Z = ifft2(y,8,8);
Z=size(Z);

why do you overwrite the first Z calculation with the results of a different ifft2? And why do you overwrite the results of that with the size of the second ifft2?