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#' 
#' This data set includes the following fields:
#' 
#' \itemize{
#'  \item \code{label} the label for each record
#'  \item \code{data} a sparse Matrix of \code{dgCMatrix} class, with 126 columns.
#' }
#'
#' @references
#' https://archive.ics.uci.edu/ml/datasets/Mushroom
#' 
#' Bache, K. & Lichman, M. (2013). UCI Machine Learning Repository 
#' [http://archive.ics.uci.edu/ml]. Irvine, CA: University of California, 
#' School of Information and Computer Science.
#' 
#' @docType data
#' @keywords datasets
#' @name agaricus.train
#' @usage data(agaricus.train)
#' @format A list containing a label vector, and a dgCMatrix object with 6513 
#' rows and 127 variables
NULL

#' Test part from Mushroom Data Set
#'
#' This data set is originally from the Mushroom data set,
#' UCI Machine Learning Repository.
#' 
#' This data set includes the following fields:
#' 
#' \itemize{
#'  \item \code{label} the label for each record
#'  \item \code{data} a sparse Matrix of \code{dgCMatrix} class, with 126 columns.
#' }
#'
#' @references
#' https://archive.ics.uci.edu/ml/datasets/Mushroom
#' 
#' Bache, K. & Lichman, M. (2013). UCI Machine Learning Repository 
#' [http://archive.ics.uci.edu/ml]. Irvine, CA: University of California, 
#' School of Information and Computer Science.
#' 
#' @docType data
#' @keywords datasets
#' @name agaricus.test
#' @usage data(agaricus.test)
#' @format A list containing a label vector, and a dgCMatrix object with 1611 
#' rows and 126 variables
NULL

# Various imports
#' @importClassesFrom Matrix dgCMatrix dgeMatrix
#' @importFrom Matrix cBind
#' @importFrom Matrix colSums
#' @importFrom Matrix sparse.model.matrix
#' @importFrom Matrix sparseVector
#' @importFrom data.table data.table
#' @importFrom data.table is.data.table
#' @importFrom data.table as.data.table
#' @importFrom data.table :=
#' @importFrom data.table rbindlist
#' @importFrom data.table setkey
#' @importFrom data.table setkeyv
#' @importFrom data.table setnames
#' @importFrom magrittr %>%
#' @importFrom stringi stri_detect_regex
#' @importFrom stringi stri_match_first_regex
#' @importFrom stringi stri_replace_first_regex
#' @importFrom stringi stri_replace_all_regex
#' @importFrom stringi stri_split_regex
#' @importFrom utils object.size str tail
#' @importFrom stats predict
#' @importFrom stats median
#' @importFrom utils head
#' @importFrom graphics barplot
#' @importFrom graphics grid
#' @importFrom graphics par
#' @importFrom graphics title
#' 
#' @import methods
#' @useDynLib xgboost, .registration = TRUE
NULL