From: Chris Lowis <chris.lowis@...>
Date: 2008-11-17T03:26:59+09:00
Subject: Re: Power Trend Line

> Im using some graphing software to produce charts which contain various
> lines.  One line i need to produce is a power trend line from an array
> dataset.  Has anyone had any experience of this in ruby?

One approach would be to use the fitting libraries provided by the GSL:
http://www.gnu.org/software/gsl/manual/html_node/Least_002dSquares-Fitting.html

To access this from Ruby you can use the Ruby GSL bindings :
http://rb-gsl.rubyforge.org/

Another approach may be to use the Ruby/R interface RRRuby :
http://rubyforge.org/projects/rsruby/

although, unless you have a compelling reason to use Ruby (such as 
integrating with existing code) you may find it better to use R directly 
(http://www.r-project.org/).

If you have some sample data or code perhaps we can come up with some 
examples,

Hope this helps,

Chris
-- 
Posted via http://www.ruby-forum.com/.