added selection sort for R (#301)

02_selection_sort/R/01_selection_sort.R

@@ -0,0 +1,30 @@
+# Finds the smallest value in an array
+find_smallest <- function(arr) {
+  # Stores the smallest value
+  smallest = arr[1]
+  # Stores the index of the smallest value
+  smallest_index = 1
+  for (i in 1:length(arr)) {
+    if (arr[i] < smallest) {
+      smallest_index = i
+      smallest = arr[i]
+    }
+  }
+  return(smallest_index)
+}
+
+# Sort array
+selection_sort <- function(arr) {
+  newArr = c()
+  for (i in 1:length(arr)) {
+    # Finds the smallest element in the array and adds it to the new array
+    smallest = find_smallest(arr)
+    newArr = c(newArr, arr[smallest])
+    # Removes that smallest element from the original array
+    arr = arr[-smallest]
+  }
+  return(newArr)
+}
+
+print(selection_sort(c(5, 3, 6, 2, 10)))
+