Matlab curve fitting toolbox acting weird
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I am entering v as x variable and G as y variable in matlab toolbox and fitting it using sum of sines, no. of terms =2
v=-90:90;
B=65;
G=(v./B).^2;
I am getting output shown below. This shows a great fit. But when I write the equation using coefficients given by matlab myself, the graph I get is not the same!!!
fitresult(x) = a1*sin(b1*x+c1) + a2*sin(b2*x+c2)
Coefficients (with 95% confidence bounds):
a1 = 504.9 (-6.058e+08, 6.058e+08)
b1 = 0.01277 (-26.03, 26.06)
c1 = 1.571 (1.525, 1.617)
a2 = 505 (-6.058e+08, 6.058e+08)
b2 = 0.01281 (-25.95, 25.98)
c2 = -1.571 (-1.617, -1.525)
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