[ubuntu-uk] Curve-fitting program or package

[Phil Bull]

Hi Robin,

On Sat, 2007-02-24 at 17:54 +0000, Robin Menneer wrote:
> I have a problem with fitting a curve to some data and would like help
> please.  The data are:
> x=375, 375, 375, 355, 315, 268,195, 110, 0
> y=2500, 2150, 1920, 1600, 1250, 936, 624, 312, 0
> I need a program that will draw a line of best fit (for me to print)
> according to different parameters,, especially log and power and find
> the best for me, and give me the equation for it. 
> I notice that there is a curve fitting program for windows and assume
> that naturally there is also one, somewhat better, for Uuntu.  Please
> will someone tell me how to get and use it.

I use Fityk. It can be a bit tricky to get an equation out of the data,
as all it gives you are the values it derives for the variables of the
fitting function you use. Also, it can only print basic graphs. I have a
blog post up about it, including some basic instructions [1].

What does the data relate to? It might not be valid to try and describe
all of the data with one function.

Thanks,

Phil

[1] - http://philbull.livejournal.com/20243.html

-- 
Phil Bull
http://www.launchpad.net/people/philbull