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
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Charles C. Berry Dept of Family/Preventive Medicine
cbe...@tajo.ucsd.edu UC San Diego
http://famprevmed.ucsd.edu/faculty/cberry/ La Jolla, San Diego 92093-0901
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