slice
From xgboost v1.0.0.2
by Tong He
Get a new DMatrix containing the specified rows of original xgb.DMatrix object
Get a new DMatrix containing the specified rows of original xgb.DMatrix object
Usage
slice(object, ...)# S3 method for xgb.DMatrix
slice(object, idxset, ...)
# S3 method for xgb.DMatrix
[(object, idxset, colset = NULL)
Arguments
- object
Object of class "xgb.DMatrix"
- ...
other parameters (currently not used)
- idxset
a integer vector of indices of rows needed
- colset
currently not used (columns subsetting is not available)
Examples
# NOT RUN {
data(agaricus.train, package='xgboost')
train <- agaricus.train
dtrain <- xgb.DMatrix(train$data, label=train$label)
dsub <- slice(dtrain, 1:42)
labels1 <- getinfo(dsub, 'label')
dsub <- dtrain[1:42, ]
labels2 <- getinfo(dsub, 'label')
all.equal(labels1, labels2)
# }
Community examples
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