shrink
Shrink the model. Only trees with indices from the range [ntree_start, ntree_end) are kept.
Method call format
shrink(ntree_end, ntree_start=0)
Parameters
ntree_start
Description
А zero-based index of the first tree to be used.
Possible types
int
Default value
0
ntree_end
Description
А zero-based index of the first tree not to be used.
Possible types
int
Default value
Required argument
Note
The bias of the truncated mode depends on the value of the ntree_start parameter:
- 0 — the original bias value is used.
- Greater than 0 — the value is set to 0.