People have addressed the reshaping part of this, but a rather nice way to generate the base sequence is:
((],-)i.)&.<: 4 1 2 3 4 3 2 ((],-)i.)&.<: 8 1 2 3 4 5 6 7 8 7 6 5 4 3 2 Marshall On Fri, Jun 27, 2014 at 12:18:09AM -0500, Kip Murray wrote: > Hold up your right hand with its back toward you and number the forefinger > through little finger 1 through 4. (I suppose the thumb has index 0.) Now > try finger tapping this pattern: > > 1 2 3 4 > 3 2 1 2 > 3 4 3 2 > 1 2 3 4 > 3 2 1 2 > 3 4 3 2 > > Write a J expression to produce this pattern. > > --Kip Murray > > > -- > Sent from Gmail Mobile > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
