Thanks for your help but I do want the items to be adjacent. I was struggling to make use of amend but I hadn't succeeded.
Linda -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Raul Miller Sent: Monday, August 13, 2012 10:03 AM To: [email protected] Subject: Re: [Jprogramming] Amend adjacent columns On Mon, Aug 13, 2012 at 5:13 AM, Linda Alvord <[email protected]> wrote: > How can I amend adjacent columns to remove duplicates? > > 2 10$'ABCDEEEFGH' > ABCDEEEFGH > ABCDEEEFGH > > 2 7$'ABCDEFG' > ABCDEFG > ABCDEFG Note that "amend" is a J primitive which preserves the shape of its right argument, so I am going to presume that you are only hinting at what you want done here. If you can relax the "adjacent" part, it's simple: ~.&.|: 2 10$'ABCDEEEFGH' ABCDEFGH ABCDEFGH If you really need to preserve duplicate columns which are not a part of an adjacent sequence, the complications that Henry spelled out will accomplish that task. FYI, -- Raul ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
