Last week I get help that how to fit a unsymmetrical gaus distributing. Now I have another problem that how to set the parameters of the user-defined function. I try to do it ,but the fit result is not well. Please see my macro in attachment.
Please give me some advises. Thanks!!
For my data, there is not a better model. I eager to get the width at half maximum each side of the maximum, so I want to fit my data with an unsymmetrical guas model which have different “sigma” at two sides of the “mean”.
I do not konw whether therer is a good method to get a good fit and achieve my aim.