[R] ctree

From: <Steve_Friedman_at_nps.gov>
Date: Mon, 21 Jun 2010 09:28:38 -0400

Hello,

This is a re-submittal of question I submitted last week, but haven't rec'd any responses.

I need to extract the probabilities used to construct the barplots displayed as part of the graph produced by plot("ctree").

For example,

library(party)

iris.ct <- ctree(Species ~ . , data = iris) plot(iris.ct)

Instead of a simple example with only 4 terminal nodes, my analysis produces 55 terminal nodes, so unless someone is really interested I'm only using the iris data as an example.

This is the model I am sending to ctree. The graph produced is very informative, but I need the information from the plot(Marshct)

Marshct <- ctree(Physiogomy ~ meanAnnualDepthAve + meanAnnualDepthWetAve + medAnnualDepthAve + medianAnnualDepthWetAve + medianAnnualDepthDryAve + continHydroWetAve + DCHperiodAverage + DCHydroDryAve + threeDayWaterDepthMinAve + threeDayWaterDepthMaxAve + sevenDayDryFreqAve + sevenDayWaterDepthMaxAve + sevenDayWaterDepthMinAve + seventeenDayWaterDepMaxAve + seventeenDayWaterDepMinAve + thirtyoneDayWaterDepthMaxAve + wetIntensityAve + BulkDensity + LOI + TP + TN + TC + Total_Mg, data = Marsh)

plot(Marshct)

Working in Windows XP with R2.11.1 (2010-05-31)

Thanks
Steve

Steve Friedman Ph. D.
Spatial Statistical Analyst
Everglades and Dry Tortugas National Park 950 N Krome Ave (3rd Floor)
Homestead, Florida 33034

Steve_Friedman_at_nps.gov
Office (305) 224 - 4282
Fax (305) 224 - 4147



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