lgb.get.eval.result.Rd

% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/lgb.Booster.R
\name{lgb.get.eval.result}
\alias{lgb.get.eval.result}
\title{Get record evaluation result from booster}
\usage{
lgb.get.eval.result(
  booster,
  data_name,
  eval_name,
  iters = NULL,
  is_err = FALSE
)
}
\arguments{
\item{booster}{Object of class \code{lgb.Booster}}

\item{data_name}{name of dataset}

\item{eval_name}{name of evaluation}

\item{iters}{iterations, NULL will return all}

\item{is_err}{TRUE will return evaluation error instead}
}
\value{
vector of evaluation result
}
\description{
Get record evaluation result from booster
}
\examples{
library(lightgbm)
data(agaricus.train, package = "lightgbm")
train <- agaricus.train
dtrain <- lgb.Dataset(train$data, label = train$label)
data(agaricus.test, package = "lightgbm")
test <- agaricus.test
dtest <- lgb.Dataset.create.valid(dtrain, test$data, label = test$label)
params <- list(objective = "regression", metric = "l2")
valids <- list(test = dtest)
model <- lgb.train(
  params = params
  , data = dtrain
  , nrounds = 10L
  , valids = valids
  , min_data = 1L
  , learning_rate = 1.0
  , early_stopping_rounds = 5L
)
lgb.get.eval.result(model, "test", "l2")
}