cb.evaluation.log
From xgboost v0.6.4.1
by Tong He
Callback closure for logging the evaluation history
Callback closure for logging the evaluation history
Usage
cb.evaluation.log()
Details
This callback function appends the current iteration evaluation results bst_evaluation
available in the calling parent frame to the evaluation_log
list in a calling frame.
The finalizer callback (called with finalize = TURE
in the end) converts
the evaluation_log
list into a final data.table.
The iteration evaluation result bst_evaluation
must be a named numeric vector.
Note: in the column names of the final data.table, the dash '-' character is replaced with the underscore '_' in order to make the column names more like regular R identifiers.
Callback function expects the following values to be set in its calling frame:
evaluation_log
,
bst_evaluation
,
iteration
.
See Also
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