From: Devin Mullins <twifkak@...>
Date: 2006-12-03T02:02:50+09:00
Subject: Re: [OT] calculations on lists of numbers

ara.t.howard@noaa.gov wrote:
>   harp:~> cat a.rb
Man, how do you keep all your a.rb's straight?

>   #! /dmsp/reference/bin/ruby
> 
>   require 'narray'
>   require 'yaml'
Am I blind, or do you require 'yaml' and never use it?

>   list = ARGF.readlines.map{|line| line.strip.split(%r/\s+/).map{|f| 
> Float f}}.flatten
Doesn't this load the whole list of numbers into memory? (i.e. how does 
it fare on "a billion values"?

>   na = NArray.to_na list
> 
>   puts '---'
>   %w( min max mean median stddev ).each{|stat| puts "#{ stat }: #{ 
> na.send stat}"}

Devin