Add shorten.vector.R (#143)

data_manipulation/shorten.vector.R

@@ -0,0 +1,23 @@
+shorten.vector <- function(vector,by){
+  # get last elements
+  vec_new <- vector |> tail(by) 
+
+  # get index of last elements
+  index <- c()
+  for(i in vec_new){
+    values <- which(vector == i) 
+    index <- c(index,values)
+  }
+
+  # delete index from vector
+  final_vec <- vector[-c(index)]
+
+  # return final output
+  return(final_vec)
+
+
+}
+
+fruits <- c("Pear","Banana","Peach","Grape","Apple","Orange")
+
+shorten.vector(fruits,by = 1)