From: dblack@...
Date: 2006-03-28T10:28:40+09:00
Subject: Re: Would this be possible?

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Hi --

On Tue, 28 Mar 2006, Craig Schweitzer wrote:

> Would this work to find the mean average and the number of elements
> greater than the average?
>
>
>
> # Calculating Avg and # of elements greater than Avg. in Ruby
>
> sum =3D 0.0
> n =3D 0
> count =3D 0
>
> while figure =3D STDIN.gets.to_f
>    sum +=3D figure
>    n +=3D 1
> end
>
> average =3D sum / n
> puts "Average =3D #{average}"
>
> while figure =3D STDIN.gets.to_f
>     if figure > average
>          count +=3D1
>     end
> end
>
> puts =E2=80=9CNumber of elements greater than Avg =3D #{count}=E2=80=9D

See other responses; here's another possibility:


   require 'scanf'

   all =3D []

   while float =3D scanf("%f")[0]
     all << float
   end

   average =3D all.inject(0) {|x,y| x + y } / all.size
   over =3D all.find_all {|f| f > average}.size

   puts "Average is #{average}"
   puts "Over average: #{over}"


David

--=20
David A. Black (dblack@wobblini.net)
Ruby Power and Light, LLC (http://www.rubypowerandlight.com)

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