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improve doc in predict

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hetong 2014-09-01 15:38:29 -07:00
parent 025ca170ec
commit b973a4dcaa
2 changed files with 9 additions and 5 deletions
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2
R-package/R/predict.xgb.Booster.R
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@ -12,7 +12,7 @@ setClass("xgb.Booster")
#' untransformed margin value. In logistic regression, outputmargin=T will
#' output value before logistic transformation.
#' @param 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
#' set it to be value bigger than 0. It will use all trees by default.
#' @examples
#' data(iris)
#' bst <- xgboost(as.matrix(iris[,1:4]),as.numeric(iris[,5]), nrounds = 2)

12
R-package/man/predict-xgb.Booster-method.Rd
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@ -4,7 +4,8 @@
\alias{predict,xgb.Booster-method}
\title{Predict method for eXtreme Gradient Boosting model}
\usage{
\S4method{predict}{xgb.Booster}(object, newdata, outputmargin = FALSE)
\S4method{predict}{xgb.Booster}(object, newdata, outputmargin = FALSE,
ntreelimit = NULL)
}
\arguments{
\item{object}{Object of class "xgb.Boost"}
@ -13,9 +14,12 @@
\code{xgb.DMatrix}.}
\item{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.}
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.}
\item{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.}
}
\description{
Predicted values based on xgboost model object.