Keep Data Together Index   <<   >>

 
   y←○?100 100⍴100

   cmpx 'y[;17]' 'y[17;]'
  y[;17] → 8.79E¯7 |  0% ⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕ 
* y[17;] → 9.23E¯7 | +4% ⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕

   x←○?1000 1000⍴100

   cmpx 'x[;17]' 'x[17;]'
  x[;17] → 8.23E¯6 |   0% ⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕
* x[17;] → 4.65E¯6 | -44% ⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕