112 lines
3.6 KiB
R
112 lines
3.6 KiB
R
# Simple interface for training an xgboost model.
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# Its documentation is combined with xgb.train.
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#
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#' @rdname xgb.train
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#' @export
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xgboost <- function(data = NULL, label = NULL, missing = NA, weight = NULL,
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params = list(), nrounds,
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verbose = 1, print_every_n = 1L,
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early_stopping_rounds = NULL, maximize = NULL,
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save_period = 0, save_name = "xgboost.model",
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xgb_model = NULL, callbacks = list(), ...) {
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dtrain <- xgb.get.DMatrix(data, label, missing, weight)
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watchlist <- list()
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if (verbose > 0)
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watchlist$train = dtrain
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bst <- xgb.train(params, dtrain, nrounds, watchlist, verbose = verbose, print_every_n=print_every_n,
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early_stopping_rounds = early_stopping_rounds, maximize = maximize,
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save_period = save_period, save_name = save_name,
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xgb_model = xgb_model, callbacks = callbacks, ...)
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return(bst)
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}
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#' Training part from Mushroom Data Set
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#'
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#' This data set is originally from the Mushroom data set,
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#' UCI Machine Learning Repository.
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#'
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#' This data set includes the following fields:
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#'
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#' \itemize{
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#' \item \code{label} the label for each record
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#' \item \code{data} a sparse Matrix of \code{dgCMatrix} class, with 126 columns.
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#' }
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#'
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#' @references
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#' https://archive.ics.uci.edu/ml/datasets/Mushroom
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#'
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#' Bache, K. & Lichman, M. (2013). UCI Machine Learning Repository
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#' [http://archive.ics.uci.edu/ml]. Irvine, CA: University of California,
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#' School of Information and Computer Science.
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#'
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#' @docType data
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#' @keywords datasets
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#' @name agaricus.train
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#' @usage data(agaricus.train)
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#' @format A list containing a label vector, and a dgCMatrix object with 6513
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#' rows and 127 variables
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NULL
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#' Test part from Mushroom Data Set
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#'
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#' This data set is originally from the Mushroom data set,
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#' UCI Machine Learning Repository.
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#'
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#' This data set includes the following fields:
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#'
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#' \itemize{
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#' \item \code{label} the label for each record
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#' \item \code{data} a sparse Matrix of \code{dgCMatrix} class, with 126 columns.
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#' }
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#'
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#' @references
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#' https://archive.ics.uci.edu/ml/datasets/Mushroom
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#'
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#' Bache, K. & Lichman, M. (2013). UCI Machine Learning Repository
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#' [http://archive.ics.uci.edu/ml]. Irvine, CA: University of California,
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#' School of Information and Computer Science.
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#'
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#' @docType data
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#' @keywords datasets
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#' @name agaricus.test
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#' @usage data(agaricus.test)
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#' @format A list containing a label vector, and a dgCMatrix object with 1611
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#' rows and 126 variables
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NULL
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# Various imports
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#' @importClassesFrom Matrix dgCMatrix dgeMatrix
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#' @importFrom Matrix cBind
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#' @importFrom Matrix colSums
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#' @importFrom Matrix sparse.model.matrix
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#' @importFrom Matrix sparseVector
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#' @importFrom data.table data.table
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#' @importFrom data.table is.data.table
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#' @importFrom data.table as.data.table
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#' @importFrom data.table :=
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#' @importFrom data.table rbindlist
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#' @importFrom data.table setkey
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#' @importFrom data.table setkeyv
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#' @importFrom data.table setnames
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#' @importFrom magrittr %>%
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#' @importFrom stringi stri_detect_regex
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#' @importFrom stringi stri_match_first_regex
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#' @importFrom stringi stri_replace_first_regex
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#' @importFrom stringi stri_replace_all_regex
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#' @importFrom stringi stri_split_regex
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#' @importFrom utils object.size str tail
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#' @importFrom stats predict
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#' @importFrom stats median
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#' @importFrom utils head
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#' @importFrom graphics barplot
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#' @importFrom graphics grid
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#' @importFrom graphics par
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#' @importFrom graphics title
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#'
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#' @import methods
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#' @useDynLib xgboost
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NULL
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