fitting data(on a table) with 2nd order polynomial

      i have a table with 3 variables(B/H)= 1,2,3,4,5,6,7,8 and fi= 0,10,20,30 and h which is depend on (B/H) and fi that contains 32 values. for example for fi=0 and (B/H)=1 >>h=1 fi=0 and (B/H)=2 >>h=1.02 ...... fi=30 and (B/H)=8 >>h=14800

    h:[ 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]     

>is there any way in MATLAB to get an 2nd order polynomial equation for h in terms of (B/H) and fi??and how could we make sure that a polynimail or a surface equation is a exact fit for our data???

Answer 1

[Igor]

Curve Fitting ToolBox z=f(x,y) sftool

[milad babaei]

tnx.