4. Bar Chart Index   <<   >>
 

   x← 3 1 4 1 5 9 


   '.⎕'[x∘.>⍳⌈/x]
⎕⎕⎕......
⎕........
⎕⎕⎕⎕.....
⎕........
⎕⎕⎕⎕⎕....
⎕⎕⎕⎕⎕⎕⎕⎕⎕
  

   ⍳ ⌈/x
0 1 2 3 4 5 6 7 8

   x ∘.> ⍳⌈/x
1 1 1 0 0 0 0 0 0
1 0 0 0 0 0 0 0 0
1 1 1 1 0 0 0 0 0
1 0 0 0 0 0 0 0 0
1 1 1 1 1 0 0 0 0
1 1 1 1 1 1 1 1 1

            — K.W. Smillie, STATPACK, University of Alberta, 1968.