multiple fitting with lsqcurvefit

I want to fit multiple curve with lsqcurvefit function

there are 4 fitting functions F1,F2,F3,F4

and Xdata is common, but different Ydata (Y1, Y2, Y3, Y4).

The parameters are common (total 6 parameters : beta1, beta2, ... , beta6)

How can I fit those 4 curves simultaneously with lsqcurvefit function?

The function may not be lsqcurvefit, but I want to set lower and upper bounds for the parameters.

Answer 1

[Star Strider]

That is probably straightforward to do. It would help if we could have your data and equations. You can post your equations here Please highlight them and format them with the [{}Code] button. Use the save function to create a ‘.mat’ file of your data, then attach it here using the ‘paperclip’ icon.

The lsqcurvefit function is the correct choice for this problem.