Assuming you want all fills to come before the corresponding element, you can use:
1j2 #&.|. data a b r a c a d a b r a I agree that fill-before is a reasonable interpretation for a negative imaginary part, although I doubt J's complex replicate, or APL's expand, are really the best way to deal with inserting fills (I don't have a better one). Marshall On Sat, Feb 01, 2020 at 11:46:24AM -0500, David Lambert wrote: > data=:'abracadabra' > > NB. whereas > 1j_2 # data > |domain error > | 1j_2 #data > > NB. I've often wanted > _2 |. 1j2 # data > a b r a c a d a b r a > > NB. because it aligns with > > 3 ": i.~ data NB. index from left > 0 1 2 0 4 0 6 0 1 2 0 > > 3 ": i:~ data NB. index from right > 10 8 9 10 4 10 6 10 8 9 10 > > duplicate =: (i: ~: i.)~ > duplicate data > 1 1 1 1 0 1 0 1 1 1 1 > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
