pattern recognition with paths
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