From: Daniel Martin <martin@...>
Date: 2006-09-07T06:04:35+09:00
Subject: Re: NArray shuffle

"Patrick Hurley" <phurley@gmail.com> writes:

> Has anyone ever needed to "shuffle" an NArray? I can certainly convert
> it to an array and do the sort_by {rand} idiom, and then convert it
> back. I currently:

What about:

shuffled = orig[NArray.float(*orig.shape).random!.sort_index]

-- 
s=%q(  Daniel Martin -- martin@snowplow.org
       puts "s=%q(#{s})",s.map{|i|i}[1]       )
       puts "s=%q(#{s})",s.map{|i|i}[1]