dimnames.xgb.DMatrix

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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) <- value
Arguments
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.

Aliases
  • dimnames.xgb.DMatrix
  • dimnames<-.xgb.DMatrix
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)

Documentation reproduced from package xgboost, version 0.6-3, License: Apache License (== 2.0) | file LICENSE

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