33 lines
1.1 KiB
R
33 lines
1.1 KiB
R
% Generated by roxygen2: do not edit by hand
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% Please edit documentation in R/callbacks.R
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\name{cb.log_evaluation}
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\alias{cb.log_evaluation}
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\title{Callback closure for logging the evaluation history}
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\usage{
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cb.log_evaluation()
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}
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\description{
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Callback closure for logging the evaluation history
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}
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\details{
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This callback function appends the current iteration evaluation results \code{bst_evaluation}
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available in the calling parent frame to the \code{evaluation_log} list in a calling frame.
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The finalizer callback (called with \code{finalize = TURE} in the end) converts
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the \code{evaluation_log} list into a final data.table.
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The iteration evaluation result \code{bst_evaluation} must be a named numeric vector.
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Note: in the column names of the final data.table, the dash '-' character is replaced with
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the underscore '_' in order to make the column names more like regular R identifiers.
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Callback function expects the following values to be set in its calling frame:
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\code{evaluation_log},
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\code{bst_evaluation},
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\code{iteration}.
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}
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\seealso{
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\code{\link{callbacks}}
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}
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