25 lines
758 B
R
25 lines
758 B
R
#' Save xgb.DMatrix object to binary file
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#'
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#' Save xgb.DMatrix object to binary file
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#'
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#' @param dmatrix the \code{xgb.DMatrix} object
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#' @param fname the name of the file to write.
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#'
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#' @examples
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#' data(agaricus.train, package='xgboost')
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#' dtrain <- with(agaricus.train, xgb.DMatrix(data, label = label, nthread = 2))
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#' fname <- file.path(tempdir(), "xgb.DMatrix.data")
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#' xgb.DMatrix.save(dtrain, fname)
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#' dtrain <- xgb.DMatrix(fname)
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#' @export
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xgb.DMatrix.save <- function(dmatrix, fname) {
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if (typeof(fname) != "character")
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stop("fname must be character")
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if (!inherits(dmatrix, "xgb.DMatrix"))
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stop("dmatrix must be xgb.DMatrix")
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fname <- path.expand(fname)
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.Call(XGDMatrixSaveBinary_R, dmatrix, fname[1], 0L)
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return(TRUE)
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}
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