leasqrdemo

[Petr Šimon]

Hello,
I am trying to fit function b*(x^a), but I don't know much about fitting
and I also have problems with derivatives.
I am using leasqrdemo.m, where I defined

p = [-1,10];
....
function y = leasqrfunc(x,p)
        y = p(2)*(x^p(1))
endfunction

but I don't know what the leasqrdfdp should look like.
function y = leasqrdfdp(x,f,p,dp,func)
        y = [?,?]
endfunction

Can anyone help? I know this is probably a trivial question, sorry for
trashing mailing list with it

Thanks a lot
Petr