Update the documentation about the exact and approximate likelihood f…

…unction

R/default_params_doc.R

@@ -420,6 +420,10 @@
 #'   incorrect output due to parameter transformation.
 #' @param num_cycles The number of cycles the optimizer will go through.
 #'   Default is 1.
+#' @param function_to_optimize Here one can indicate to use a function
+#'   ('DAISIE_approx') that approximates the DAISIE likelihood or the default
+#'   value 'DAISIE_exact'). The approximate likelihood can for example be used
+#'   in case the exact one fails.
 #' @param trait_pars A named list containing diversification rates considering
 #'   two trait states created by \code{\link{create_trait_pars}}:
 #' \itemize{