dimnames.xgb.DMatrix
From xgboost v0.6-3
by Tong He
Handling of column names of xgb.DMatrix
Only column names are supported for xgb.DMatrix, thus setting of
row names would have no effect and returnten row names would be NULL.
Usage
"dimnames"(x)
"dimnames"(x) <- valueArguments
- x
- object of class
xgb.DMatrix - value
- a list of two elements: the first one is ignored and the second one is column names
Details
Generic dimnames methods are used by colnames.
Since row names are irrelevant, it is recommended to use colnames directly.
Examples
data(agaricus.train, package='xgboost')
train <- agaricus.train
dtrain <- xgb.DMatrix(train$data, label=train$label)
dimnames(dtrain)
colnames(dtrain)
colnames(dtrain) <- make.names(1:ncol(train$data))
print(dtrain, verbose=TRUE)
Community examples
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