diff --git a/R/fuzzyoverlay.R b/R/fuzzyoverlay.R
index dd42933..8434995 100644
--- a/R/fuzzyoverlay.R
+++ b/R/fuzzyoverlay.R
@@ -42,7 +42,7 @@ fuzzyoverlay = \(formula, data, method = "and"){
                                    \(.x) return(fuzzynum[.x])))
   fuzzyindice = apply(xsfn, 1, fuzzyf)
   fuzzyzone = xs %>%
-    split(seq(nrow(xs))) %>%
+    split(seq_len(nrow(xs))) %>%
     purrr::map2_chr(fuzzyindice,
                    \(.tdf,.indice) .tdf[1,.indice,drop = TRUE])
   return(fuzzyzone)
diff --git a/R/vector_toolkits.R b/R/vector_toolkits.R
index d9b8c10..4930764 100644
--- a/R/vector_toolkits.R
+++ b/R/vector_toolkits.R
@@ -54,7 +54,7 @@ normalize_vector = \(x,to_left = 0,to_right = 1){
 #'
 generate_subsets = \(set,empty = TRUE,self = TRUE) {
   n = length(set)
-  subsets = list(c())
+  subsets = list()
   for (i in seq(set)) {
     subsets = c(subsets, utils::combn(set, i, simplify = FALSE))
   }