.listOMLDataSets = function(number.of.instances = NULL, number.of.features = NULL,
number.of.classes = NULL, number.of.missing.values = NULL,
tag = NULL, data.name = NULL,
limit = 5000, offset = NULL, status = "active", verbosity = NULL) {
api.call = generateAPICall("json/data/list",
number.of.instances = number.of.instances, number.of.features = number.of.features,
number.of.classes = number.of.classes, number.of.missing.values = number.of.missing.values,
tag = tag, data.name = data.name,
limit = limit, offset = offset, status = status)
content = doAPICall(api.call = api.call, file = NULL, verbosity = verbosity, method = "GET")
if (is.null(content)) return(data.frame())
res = fromJSON(txt = content, simplifyVector = FALSE)$data$dataset
qualities = convertNameValueListToDF(extractSubList(res, "quality", simplify = FALSE))
tags = convertTagListToTagString(res)
res = rbindlist(lapply(res, function(x) x[c("did", "name", "version", "status", "format")]))
if (nrow(qualities) == 0L)
res = setDF(cbind(res, tags)) else
res = setDF(cbind(res, tags, qualities))
# convert to integer
i = colnames(res) %in% colnames(qualities)
if (any(i))
res[i] = lapply(res[i], as.integer)
# finally convert _ to . in col names
names(res) = convertNamesOMLToR(names(res))
return(res)
}
#' @title List the first 5000 OpenML data sets.
#'
#' @description
#' The returned \code{data.frame} contains the data set id \dQuote{data.id},
#' the \dQuote{status} (\dQuote{active}, \dQuote{deactivated}, \dQuote{in_preparation})
#' and describing data qualities.
#'
#' Note that by default only active data sets (due to \dQuote{status = "active"}) will be returned.
#' Furthermore, the argument \dQuote{limit = 5000} will limit the number of results to 5000.
#'
#' @template note_memoise
#'
#' @template arg_number.of.instances
#' @template arg_number.of.features
#' @template arg_number.of.classes
#' @template arg_number.of.missing.values
#' @template arg_tag
#' @template arg_data.name
#' @template arg_limit
#' @template arg_offset
#' @template arg_status
#' @template arg_verbosity
#' @return [\code{data.frame}].
#' @family listing functions
#' @family data set-related functions
#' @export
#' @example inst/examples/listOMLDataSets.R
listOMLDataSets = memoise(.listOMLDataSets)
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