How to fit data to a Weibull bi-modal function ? nlinfit? lsqcurvefit?

Hello!

I have some X,Y data I need to fit to a bi-modal Weibull distribution. The equation is fairly simpe and comes with 4 coefficients to be determined.

y=100*x*exp(-((100*x)/C1)^C2-((100*x)/C3)^C4)

please find x and y data attached. Can somebody please help?

Thanks in advance

Answer 1

[Alex Sha]

please refer the results below:

c1 6.93726775107201

c2 2.61789361078231

c3 5.06299442732144

c4 4.41925787462909

or:

c1 5.06299439886379

c2 4.41925785860654

c3 6.93726794540503

c4 2.61789355544764