doc: IPCW surv predictions should be evaluated at tau only

R/PipeOpPredClassifSurvIPCW.R

@@ -28,8 +28,10 @@
 #' Therefore, these predictions serve as **continuous risk scores** that can be
 #' directly interpreted as `crank` predictions in the right-censored survival
 #' setting. We also map them to the survival distribution prediction `distr`,
-#' at the specified cutoff time point, i.e. as
+#' at the specified cutoff time point \eqn{\tau}, i.e. as
 #' \eqn{S_i(\tau) = 1 - \hat{\pi}(\bold{X}_i)}.
+#' Survival measures that use the survival distribution (eg [ISBS][mlr_measures_surv.brier])
+#' should be evaluated exactly at the cutoff time point \eqn{\tau}, see example.
 #'
 #' @references
 #' `r format_bib("vock_2016")`

R/PipeOpResponseCompositor.R

@@ -72,7 +72,7 @@
 #'   # mostly improper survival distributions, "median" sets the survival time
 #'   # to the last time point
 #'
-#'   # RMST (default) as response, while also changing the crank = -response
+#'   # RMST (default) as response, while also changing the `crank` to `-response`
 #'   por = po("responsecompose", param_vals = list(overwrite = TRUE, add_crank = TRUE))
 #'   por$predict(list(pred))[[1L]]
 #' }