% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/callbacks.R
\name{xgb.cb.evaluation.log}
\alias{xgb.cb.evaluation.log}
\title{Callback for logging the evaluation history}
\usage{
xgb.cb.evaluation.log()
}
\value{
An \code{xgb.Callback} object, which can be passed to \code{\link[=xgb.train]{xgb.train()}} or \code{\link[=xgb.cv]{xgb.cv()}}.
}
\description{
Callback for logging the evaluation history
}
\details{
This callback creates a table with per-iteration evaluation metrics (see parameters
\code{evals} and \code{custom_metric} in \code{\link[=xgb.train]{xgb.train()}}).

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.
}
\seealso{
\link{xgb.cb.print.evaluation}
}
