How to pass several vectors to a custom fit function

Hello everyone,

I am having serious trouble getting my fit to work (worked like a charm with fminsearch but now I need confidence bounds, so I have to use fit)

My problem is that I need to pass several vectors or matrices to my fit function which is defined in a seperate .m file.

Basically it would look like this:

f=fittype('TR3PPE(x-axis,another x-axis,y-axis needed for calculations,w'),'independent',{'x-axis','another x-axis','y-axis needed for calculations'},'coefficients',{'w'} );

where TR3PPE.m is function [Signal]=TR3PPE(x-axis,another x-axis, y-axis needed for calculations, w)

x-axis is a 78x1 double

another x-axis is a 22,000x1 double

y-axis needed for calculations is a 22,000x1 double

Starting point for w is 100, minimum is 50, maximum is inf.

Now when I start the script, the fit is called with

x-axis 7x1 double

another x-axis 7x1 double

y-axis needed for calculation 7x1 double

w = 0.5

I am completely confused and have no clue as to what I can do about this.

Thanks for any advice you can give me on this