#' Create a meta information dataset in gpm format
#'
#' @description
#' Create a meta dataset layer for a gpm object.
#'
#' @param dataset The name of the data frame variable used for initializing the
#' gmp object
#' @param type The type of the dataset (e.g. input, output), defaults to "input"
#' @param selector An optional selector variable which can be used to control
#' the sampling of subsets during model training
#' @param response The column ID of the response, i.e. dependent variable(s) in
#' the dataset
#' @param predictor The column ID of the predictor, i.e. independent
#' variable(s) in the dataset
#' @param meta The column ID of variables in the dataset which contain only meta
#' information not relevant for the model training
#'
#' @return A list in the appropriate format to be used as meta data layer in a
#' gpm object.
#'
#' @export createGPMMeta
#'
#' @details The column ID information is transformed to column names in order to
#' ensure integrity even if columns are deleted in a later stage.
#'
#' @references NONE
#'
#' @seealso \code{\link{AAAgpmClasses}} for the gpm class.
#'
#' @examples
#' \dontrun{
#' data(abies_alba)
#' createGPMMeta(dataset = abies_alba, type = "input",
#' selector = 1, response = c(16:481), meta = c(2: 15))
#' }
#'
createGPMMeta <- function(dataset, type = "input",
selector, response, predictor, meta){
if(!any(colnames(dataset) %in% selector)){
selector <- colnames(dataset)[selector]
}
if(!any(colnames(dataset) %in% response)){
response <- colnames(dataset)[response]
}
if(!any(colnames(dataset) %in% predictor)){
predictor <- colnames(dataset)[predictor]
}
if(!any(colnames(dataset) %in% meta)){
meta <- colnames(dataset)[meta]
}
list(TYPE = type,
SELECTOR = selector,
RESPONSE = response,
RESPONSE_FINAL = response,
PREDICTOR = predictor,
PREDICTOR_FINAL = predictor,
META = meta)
}
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