[proFit-list] FindMaximum, Analyze

[Gareth Swarbrick]

Not sure if the space between the 'a' and the '[5]' is causing your  
problem but worth a try...

Gareth.

On 21/12/2007, at 12:47 PM, Joseph Walrath wrote:

> Hello,
>
> I am having some trouble the with Analyze function. I have a simple  
> 4th order polynomial function:
>
> function SlopeFunction;
> begin
>               y:= a[1] + a[2] + 2.0* a[4]*(x-a[3]) + 3.0*a [5]*(x - 
> a[3])^2
>  	
> 		+ 4.0* a[6]*(x- a[3])^3 + 5.0*a[7]*(x -a[3])^4 ;
> end ;
>
>
> The parameters are always defined with SetParameterProperties.   
> However, I get NAN as an answer for both x and y.
>
> Analyze( function SlopeFunction, type FindMaximum,  
> useFittedParameters false, tabulateResults  true,
> 	parameter 0, xMin -10, xMax 10, subintervals 4);
>
> Anyone had problems with this routine?
>
> Thanks much
> Joe
>
> -- 
> Joseph Walrath, MD
> Departments of Ophthalmology
> Columbia University, Edward S. Harkness Eye Institute
> St. Vincent's Catholic Medical Center

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