dim.xgb.DMatrix

Dimensions of xgb.DMatrix

Returns a vector of numbers of rows and of columns in an xgb.DMatrix.

Usage

# S3 method for xgb.DMatrix
dim(x)

Details

Note: since nrow and ncol internally use dim, they can also be directly used with an xgb.DMatrix object.

Aliases

• dim.xgb.DMatrix

Examples

# NOT RUN {
data(agaricus.train, package='xgboost')
train <- agaricus.train
dtrain <- xgb.DMatrix(train$data, label=train$label)

stopifnot(nrow(dtrain) == nrow(train$data))
stopifnot(ncol(dtrain) == ncol(train$data))
stopifnot(all(dim(dtrain) == dim(train$data)))

# }