Having trouble making a for loop equation

I am trying to make a for loop that would help me generate a polyfit to a data I have:

>> polyfit(T(x,y,z),z/30,8)

x goes up to 240

y goes up to 320

z goes up to 1500

[KSSV]

What trouble you have?

Answer 1

[David H]

It isn't obvious what you are trying to do, you have a 3D function and want to fit an order 8 polynomial to it in z only?

1. In case you want to fit a 240 by 320 array of polynomials for every single slice through that array, loop over the x and y positions
2. In case you want to fit a 3 D polynomial you might want to look at https://www.mathworks.com/matlabcentral/fileexchange/34765-polyfitn