fix man links

R/direction_group.R

@@ -14,7 +14,7 @@
 #' The \code{direction} and \code{group} arguments expect the names of columns
 #' in \code{DT} which correspond to the direction and group columns. The
 #' direction column is expected in units of radians and the mean calculated with
-#' \code{\link{CircStats::circ.mean}}.
+#' [CircStats::circ.mean()].
 #'
 #' @param DT input data.table with distance column generated by
 #'   \code{distance_step} and group column generated with \code{group_pts}
@@ -26,14 +26,15 @@
 #'   \code{group_direction} column representing the mean direction of
 #'   all individuals in each spatiotemporal group.
 #'
-#'   The mean direction is calculated using \code{\link{CircStats::circ.mean}}
+#'   The mean direction is calculated using [CircStats::circ.mean()]
 #'   which expects units of radians.
 #'
 #'   A message is returned when the \code{group_direction} columns already
 #'   exists in the input \code{DT}, because it will be overwritten.
 #'
 #' @export
-#' @seealso \code{\link{direction_step}}, \code{\link{group_pts}}
+#' @seealso \code{\link{direction_step}}, \code{\link{group_pts}},
+#'   [CircStats::circ.mean()]
 #' @family Direction functions
 #'
 #' @references