predict,xgb.Booster-method

0th

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Predict method for eXtreme Gradient Boosting model

Predicted values based on xgboost model object.

Usage
"predict"(object, newdata, missing = NULL, outputmargin = FALSE, ntreelimit = NULL, predleaf = FALSE)
Arguments
object
Object of class "xgb.Boost"
newdata
takes matrix, dgCMatrix, local data file or xgb.DMatrix.
missing
Missing is only used when input is dense matrix, pick a float value that represents missing value. Sometime a data use 0 or other extreme value to represents missing values.
outputmargin
whether the prediction should be shown in the original value of sum of functions, when outputmargin=TRUE, the prediction is untransformed margin value. In logistic regression, outputmargin=T will output value before logistic transformation.
ntreelimit
limit number of trees used in prediction, this parameter is only valid for gbtree, but not for gblinear. set it to be value bigger than 0. It will use all trees by default.
predleaf
whether predict leaf index instead. If set to TRUE, the output will be a matrix object.
Aliases
  • predict,xgb.Booster-method
Examples
data(agaricus.train, package='xgboost')
data(agaricus.test, package='xgboost')
train <- agaricus.train
test <- agaricus.test
bst <- xgboost(data = train$data, label = train$label, max.depth = 2,
               eta = 1, nthread = 2, nround = 2,objective = "binary:logistic")
pred <- predict(bst, test$data)
Documentation reproduced from package xgboost, version 0.4-4, License: Apache License (== 2.0) | file LICENSE

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