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

Asked by milad babaei on 2 Jul 2011
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???

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1 Answer

Answer by Igor
on 2 Jul 2011

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

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