various updates to comply with CRAN maintainer's requests

DESCRIPTION

@@ -21,7 +21,7 @@ BugReports: https://github.com/pln-team/PLNmodels/issues
 License: GPL (>= 3)
 Encoding: UTF-8
 Roxygen: list(markdown = TRUE)
-RoxygenNote: 7.1.2
+RoxygenNote: 7.2.1
 Depends: R (>= 3.4)
 LazyData: true
 biocViews:

R/PLNLDA.R

@@ -34,9 +34,9 @@
 PLNLDA <- function(formula, data, subset, weights, grouping, control = list()) {
 
   ## look for grouping in the data or the parent frame
-  if (class(try(eval(grouping), silent = TRUE)) == "try-error") {
+  if (inherits(try(eval(grouping), silent = TRUE), "try-error")) {
     grouping <- try(eval(substitute(grouping), data), silent = TRUE)
-    if (class(grouping) == "try-error") stop("invalid grouping")
+    if (inherits(grouping, "try-error")) stop("invalid grouping")
   }
   grouping <- as.factor(grouping)
 

R/PLNfamily-class.R

@@ -12,8 +12,6 @@
 #'
 #' @inherit PLN details
 #'
-#' @seealso
-#'
 #' @rdname PLNfamily
 #' @include PLNfamily-class.R
 #' @importFrom R6 R6Class