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#' @rdname Task
#' @export
makeSurvTask = function(id = deparse(substitute(data)), data, target, weights = NULL, blocking = NULL, coordinates = NULL, fixup.data = "warn", check.data = TRUE) {
assertString(id)
assertDataFrame(data)
assertCharacter(target, any.missing = FALSE, len = 2L)
assertChoice(fixup.data, choices = c("no", "quiet", "warn"))
assertFlag(check.data)
if (fixup.data != "no") {
time = data[[target[1L]]]
event = data[[target[2L]]]
if (is.integer(time))
data[[target[1L]]] = as.double(time)
if (is.numeric(event)) {
if (testIntegerish(event) && all(as.integer(event) %in% c(0L, 1L)))
data[[target[2L]]] = (as.integer(event) == 1L)
} else if (is.factor(event)) {
lvls = levels(event)
if (length(lvls) == 2L) {
if (all(lvls %in% c("TRUE", "FALSE"))) {
data[[target[2L]]] = (event == "TRUE")
} else if (all(lvls %in% c("0", "1"))) {
data[[target[2L]]] = (as.character(event) == "1")
}
}
}
}
task = makeSupervisedTask("surv", data, target, weights, blocking, coordinates, fixup.data = fixup.data, check.data = check.data)
if (check.data) {
time = data[[target[1L]]]
event = data[[target[2L]]]
assertNumeric(time, lower = 0, finite = TRUE, any.missing = FALSE, .var.name = "target column time")
assertLogical(event, any.missing = FALSE, .var.name = "target column event")
}
task$task.desc = makeSurvTaskDesc(id, data, target, weights, blocking, coordinates)
addClasses(task, "SurvTask")
}
#' @export
#' @rdname makeTaskDesc
makeSurvTaskDesc = function(id, data, target, weights, blocking, coordinates) {
td = makeTaskDescInternal("surv", id, data, target, weights, blocking, coordinates)
addClasses(td, c("SurvTaskDesc", "SupervisedTaskDesc"))
}
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