xgb.DMatrix
Construct xgb.DMatrix object
Construct xgb.DMatrix object from either a dense matrix, a sparse matrix, or a local file.
Supported input file formats are either a libsvm text file or a binary file that was created previously by
xgb.DMatrix.save).
Usage
xgb.DMatrix(data, info = list(), missing = NA, silent = FALSE, ...)Arguments
- data
a
matrixobject (either numeric or integer), adgCMatrixobject, or a character string representing a filename.- info
a named list of additional information to store in the
xgb.DMatrixobject. Seesetinfofor the specific allowed kinds of- missing
a float value to represents missing values in data (used only when input is a dense matrix). It is useful when a 0 or some other extreme value represents missing values in data.
- silent
whether to suppress printing an informational message after loading from a file.
- ...
the
infodata could be passed directly as parameters, without creating aninfolist.
Examples
# NOT RUN {
data(agaricus.train, package='xgboost')
train <- agaricus.train
dtrain <- xgb.DMatrix(train$data, label=train$label)
xgb.DMatrix.save(dtrain, 'xgb.DMatrix.data')
dtrain <- xgb.DMatrix('xgb.DMatrix.data')
if (file.exists('xgb.DMatrix.data')) file.remove('xgb.DMatrix.data')
# }