fitting of an implicite function

[Arne]

I would like to fit an data set (x(i), y(i), i=0..N) to an implicit
function in Labview (6.1), like 0 = g(x(i),y(i),a), a is the vector of
parameters to fit. There is no explicit form y(i) = f(x(i),a) of the
function.

Did anyone can help me? (VI, library, etc)

Thanks arne

[Jeremy Braden]

I have never heard of a LV implicit function fitter. I am not sure how to fit an implicit function by hand or any other method. Does an algorithm exist? If so, you may have to code it yourself.

[Arne]

Yes there are fitting routines for implicit function of the kind
0=g(y,x,a) or with more variables. So I think NAG, Numerical Recipies or
Matlab do have some.

But may be you are right, we have to code it ourselfe or to use some
tricks to use the explicit function fitting VI's.

Jeremy Braden wrote:
> I have never heard of a LV implicit function fitter. I am not sure
> how to fit an implicit function by hand or any other method. Does an
> algorithm exist? If so, you may have to code it yourself.

Thanks
arne

Jeremy Braden wrote:
> I have never heard of a LV implicit function fitter. I am not sure
> how to fit an implicit function by hand or any other method. Does an
> algorithm exist? If so, you may have to code it yourself.