code writing+fitting data with polynomial

HI,

would someone plz help me how can i use this written script to make a code,fitting my data?

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my data definition :

BoverH=1:8;
phi=0:10:30;

mydata = [ 1  1.02   1.11  1.21  1.3   1.4  1.59  1.78; ...   
        1    1.11  1.35  1.62  1.95  2.33   3.34  4.77; ...
        1.01  1.39  2.12  3.29  5.17  8.29  22    61; ...
        1.13   2.5   6.36  17.5   50   150  1400  14800];

h=log(mydata);   

y=phi;
x=BoverH;
z=h;

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and the link of polynomial fit function which i would like to use :

http://www.mathworks.com/matlabcentral/fileexchange/31636-2d-polynomial-fitting-with-svd

Answer 1

[Walter Roberson]

order = 3;  %salt to taste

[X, Y] = ndgrid(BoverH, phi);
Z = h.';
coeffs = fit2dPolySVD(X(:), Y(:), Z(:), order);

You should double-check the X and Y pairs to be sure that I got the right matching order for Z(:)

[milad babaei]

for 3th orde we have 10 coeff. if i want to male the equation how could i arrange thoese coeff. * X AND Y??TO EVALUATE POLYNOMIAL