[R] pattern recognition with paths

[Charles C. Berry]

On Wed, 5 Jan 2011, Benjamin Polidore wrote:

> I'm trying to identify patterns among various "paths" like the following:
>
> http://i.imgur.com/bQPI3.png
>
> If I plot these, I can observe intuitively two different patterns: a front
> loaded (1 and 3) and a backloaded (2,4) progress path:
>
> http://i.imgur.com/L5qwZ.png
>
> I have thousands of observations like the above table, and I want to use R
> to identify clusters of these paths.  I looked at spatstat, but it seems
> more relevant to points than paths.

Hmmm. Is this what you are after?

 	http://en.wikipedia.org/wiki/Functional_data_analysis

It is a hefty topic.

There is a substantial literature on characterizing curves. Just  Google

 	Functional Data Analysis

for a start and look at the 'fda' and 'MFDA' packages.

HTH,

Chuck

>
> Thanks,
> bp
>
> 	[[alternative HTML version deleted]]
>
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Charles C. Berry                            Dept of Family/Preventive Medicine
cberry at tajo.ucsd.edu			    UC San Diego
http://famprevmed.ucsd.edu/faculty/cberry/  La Jolla, San Diego 92093-0901