rfProximity: A random forest based proximity function
Description
Random forest computes similarity between instances with classification of out-of-bag instances.
If two out-of-bag cases are classified in the same tree leaf the proximity between them is incremented.
Usage
rfProximity(model, outProximity=TRUE)
Arguments
model
a CORElearn model of type random forest.
outProximity
if TRUE, function returns a proximity matrix, else it returns a distance matrix.
Value
Returned matrix is used as an input to other function (see rfOutliers
and rfClustering).
Details
A proximity is transformed into distance with expression distance=sqrt(1-proximity).
References
Leo Breiman: Random Forests. Machine Learning Journal, 45:5-32, 2001