domain(3, 6, 7, 8, 8, 10, 13, 15, 16, 20).range(0, 1, 2, 3):
  quantiles -> 7.25,9,14.5
          3 -> 0
          6 -> 0
        6.9 -> 0
          7 -> 0
        7.1 -> 0
          8 -> 1
        8.9 -> 1
          9 -> 2
        9.1 -> 2
         10 -> 2
         13 -> 2
       14.9 -> 3
         15 -> 3
       15.1 -> 3
         16 -> 3
         20 -> 3

domain(3, 6, 7, 8, 8, 9, 10, 13, 15, 16, 20).range(0, 1, 2, 3):
  quantiles -> 7.5,9,14
          3 -> 0
          6 -> 0
        6.9 -> 0
          7 -> 0
        7.1 -> 0
          8 -> 1
        8.9 -> 1
          9 -> 2
        9.1 -> 2
         10 -> 2
         13 -> 2
       14.9 -> 3
         15 -> 3
       15.1 -> 3
         16 -> 3
         20 -> 3

domain(0, 1).range(0, 1):
  quantiles -> 0.5
        -.5 -> 0
          0 -> 0
        .49 -> 0
        .51 -> 1
          1 -> 1
        1.5 -> 1

domain(1, 2, 3, 4).range(a, b):
  quantiles -> 2.5
          0 -> a
          1 -> a
          2 -> a
       2.49 -> a
       2.51 -> b
          3 -> b
          4 -> b
          5 -> b

domain(1, 2, 3, 4).range(a, b, c):
  quantiles -> 2,3
          0 -> a
          1 -> a
        1.9 -> a
          2 -> b
        2.1 -> b
        2.9 -> b
          3 -> c
        3.1 -> c
          4 -> c
          5 -> c

domain(1, 1, 2, 2, 3, 3, 4, 4).range(a, b, c, d):
  quantiles -> 1.75,2.5,3.25
          0 -> a
          1 -> a
       1.49 -> a
       1.51 -> a
          2 -> b
       2.49 -> b
       2.51 -> c
          3 -> c
       3.49 -> d
       3.51 -> d
          4 -> d
          5 -> d

domain(1, 2, 3, 4, 5, 6, 7, 8).range(a, b, c, d):
  quantiles -> 2.75,4.5,6.25
          0 -> a
          1 -> a
          2 -> a
       2.49 -> a
       2.51 -> a
          3 -> b
          4 -> b
       4.49 -> b
       4.51 -> c
          5 -> c
          6 -> c
       6.49 -> d
       6.51 -> d
          7 -> d
          8 -> d
          9 -> d