56 lines
1.8 KiB
R
56 lines
1.8 KiB
R
% Generated by roxygen2: do not edit by hand
|
|
% Please edit documentation in R/xgb.save.R
|
|
\name{xgb.save}
|
|
\alias{xgb.save}
|
|
\title{Save xgboost model to binary file}
|
|
\usage{
|
|
xgb.save(model, fname)
|
|
}
|
|
\arguments{
|
|
\item{model}{model object of \code{xgb.Booster} class.}
|
|
|
|
\item{fname}{name of the file to write.}
|
|
}
|
|
\description{
|
|
Save xgboost model to a file in binary format.
|
|
}
|
|
\details{
|
|
This methods allows to save a model in an xgboost-internal binary format which is universal
|
|
among the various xgboost interfaces. In R, the saved model file could be read-in later
|
|
using either the \code{\link{xgb.load}} function or the \code{xgb_model} parameter
|
|
of \code{\link{xgb.train}}.
|
|
|
|
Note: a model can also be saved as an R-object (e.g., by using \code{\link[base]{readRDS}}
|
|
or \code{\link[base]{save}}). However, it would then only be compatible with R, and
|
|
corresponding R-methods would need to be used to load it. Moreover, persisting the model with
|
|
\code{\link[base]{readRDS}} or \code{\link[base]{save}}) will cause compatibility problems in
|
|
future versions of XGBoost. Consult \code{\link{a-compatibility-note-for-saveRDS-save}} to learn
|
|
how to persist models in a future-proof way, i.e. to make the model accessible in future
|
|
releases of XGBoost.
|
|
}
|
|
\examples{
|
|
data(agaricus.train, package='xgboost')
|
|
data(agaricus.test, package='xgboost')
|
|
|
|
## Keep the number of threads to 1 for examples
|
|
nthread <- 1
|
|
data.table::setDTthreads(nthread)
|
|
|
|
train <- agaricus.train
|
|
test <- agaricus.test
|
|
bst <- xgb.train(
|
|
data = xgb.DMatrix(train$data, label = train$label),
|
|
max_depth = 2,
|
|
eta = 1,
|
|
nthread = nthread,
|
|
nrounds = 2,
|
|
objective = "binary:logistic"
|
|
)
|
|
fname <- file.path(tempdir(), "xgb.ubj")
|
|
xgb.save(bst, fname)
|
|
bst <- xgb.load(fname)
|
|
}
|
|
\seealso{
|
|
\code{\link{xgb.load}}, \code{\link{xgb.Booster.complete}}.
|
|
}
|