importance {randomForest} | R Documentation |
This is the extractor function for variable importance measures as
produced by randomForest
.
## S3 method for class 'randomForest': importance(x, type=NULL, class=NULL, scale=TRUE, ...)
x |
an object of class randomForest |
type |
either 1 or 2, specifying the type of importance measure (1=mean decrease in accuracy, 2=mean decrease in node impurity). |
class |
for classification problem, which class-specific measure to return. |
scale |
For permutation based measures, should the measures be divided their ``standard errors''? |
... |
not used. |
See the documentation for randomForest
for explanation
of how the importance measures are computed.
A (named) vector of importance measure, one for each predictor variable.