Note that you can skip the issue with the padded zeros by processing through to a regular structure at the first "1 ([: +/ ~.)"1 |: ar or using atop +/@~."1 |: ar On Tue, Nov 27, 2012 at 12:56 PM, Linda Alvord <lindaalvord at verizon.net>wrote: > (+/"1) 0~: (~.)"1 |: