Thomas,


On Sun, 2007-12-16 at 23:55 +0000, Thomas Adam wrote:
> On 16/12/2007, Phil Rhoades <phil / pricom.com.au> wrote:
> > People,
> >
> > Does anyone know of a Ruby app that will fit a curve to data eg fitting
> > a curve to:
> >
> > -10 0
> > -9  19
> 
> This looks like a prime candidate for GNUPlot -- which ruby has bindings for.


I think GNUPlot requires the knowledge of the type of fn you are trying
to fit - I want the software to TELL me what sort of fn it is eg for the
data:

-10     0
-9      19
-8      36
-7      51
-6      64
-5      75
-4      84
-3      91
-2      96
-1      99
0       100
1       99
2       96
3       91
4       84
5       75
6       64
7       51
8       36
9       19
10      0

http://www.zunzun.com tells me that the formula for this data is:

	y = a( atan(x) ) + b( x2 ) + c( sinh(x) ) + offset 

I would like to be able to do this myself with my own (preferably Ruby)
code.

Thanks,

Phil.
-- 
Philip Rhoades

Pricom Pty Limited  (ACN 003 252 275  ABN 91 003 252 275)
GPO Box 3411
Sydney NSW      2001
Australia
Fax:     +61:(0)2-8221-9599
E-mail:  phil / pricom.com.au