What is the difference with your question in October last year: http://www.jsoftware.com/pipermail/programming/2006-October/003836.html ?
R. E. Boss -----Oorspronkelijk bericht----- Van: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Namens Leigh J. Halliwell Verzonden: vrijdag 20 april 2007 2:02 Aan: 'Programming forum' Onderwerp: [Jprogramming] Boxing Data Dear J Forum: I want to box a vector of numbers and want to box according to another vector that tells how many to put in the boxes. For example, 11 12 13 14 15 BoxAccTo 3 0 2 means (11 12 13); ace; (14 15). It's important that zeroes produce empty boxes. Also, +/ of the second vector must equal # of the first. I've created a tacit function that does the job. However, I suspect that it's inefficient. In particular, it doesn't use the cut primitive (;), because cut doesn't like boxing 0 elements. So I hope that you can come up with simpler, more efficient tacit functions. Thanks. Sincerely, Leigh ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
