| isotree.build.indexer {isotree} | R Documentation |
Build Indexer for Faster Terminal Node Predictions and/or Distance Calculations
Description
Builds an index of terminal nodes for faster prediction of terminal node numbers (calling 'predict' with 'type="tree_num"').
Optionally, can also pre-calculate terminal node distances in order to speed up distance calculations (calling 'predict' with 'type="dist"' or 'type="avg_sep"').
Usage
isotree.build.indexer(model, with_distances = FALSE, nthreads = model$nthreads)
Arguments
model |
An Isolation Forest model (as returned by function isolation.forest) for which an indexer for terminal node numbers and/or distances will be added. The object will be modified in-place. |
with_distances |
Whether to also pre-calculate node distances in order to speed up 'predict' with 'type="dist"' or 'type="avg_sep"'. Note that this will consume a lot more memory and make the resulting object significantly heavier. |
nthreads |
Number of parallel threads to use. |
Details
This feature is not available for models that use 'missing_action="divide"' or 'new_categ_action="weighted"' (which are the defaults when passing 'ndim=1').
Value
The same 'model' object (as invisible), but now with an indexer added to it. Note the input object is modified in-place regardless.