slice
From xgboost v0.3-1
by Tong He
Get a new DMatrix containing the specified rows of orginal xgb.DMatrix object
Get a new DMatrix containing the specified rows of orginal xgb.DMatrix object
Usage
slice(object, ...)## S3 method for class 'xgb.DMatrix':
slice(object, idxset, ...)
Arguments
- object
- Object of class "xgb.DMatrix"
- idxset
- a integer vector of indices of rows needed
- ...
- other parameters
Examples
data(agaricus.train, package='xgboost')
train <- agaricus.train
dtrain <- xgb.DMatrix(train$data, label=train$label)
dsub <- slice(dtrain, 1:3)
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