
Returns a vector of numbers of rows and of columns in an xgb.DMatrix
.
# S3 method for xgb.DMatrix
dim(x)
Object of class xgb.DMatrix
Note: since nrow
and ncol
internally use dim
, they can also
be directly used with an xgb.DMatrix
object.
# 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)))
# }
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