Custom equation curve fitting in Matlab

0
votes

I am trying to use Matlab to find the values of the coeffiecients of the following equation 

y=ax/((c+bx)*(a+cx+b))

I have 7 data points for y and x . How can I do this using curve fitting toolbox

1
matlab

1 Answers

1
votes

Use least squares fitting:

 f = fittype('a*x./((c+b*x).*(a+c*x+b))');
 [fit1,gof,fitinfo] = fit(x',y',f,'StartPoint',[1 1 1]);

Try multiple start points to warrant a global minimum is reached.