From: Michael Fellinger <m.fellinger@...>
Date: 2006-06-06T17:20:10+09:00
Subject: Re: mode

li.inject(Hash.new(0)){|s,v| s[v] += 1; s}.max.last

On Monday 05 June 2006 16:23, Elliot Temple wrote:
> On Jun 4, 2006, at 11:31 PM, Alder Green wrote:
> > li.uniq.collect {|i| [li.select {|j| j == i}.size, i]}.sort.last.last
>
> cool, thanks, collecting pairs works well.
>
> On Jun 4, 2006, at 11:40 PM, Daniel Sheppard wrote:
> >> -----Original Message-----
> >> From: Elliot Temple [mailto:curi@curi.us]
> >>
> >> I bet there's a more elegant way to write this. Anyone want
> >> to show me?
> >>
> >> def mode(li)
> >
> > ...
> >
> >> end
> >
> > It would probably help if you said what you were trying to achieve
> > rather than asking people to try and interpret code that you admit
> > isn't
> > elegant.
>
> Mode means:
>
> (Statistics) the value that occurs most frequently in a given set of
> data.
>
> > class Array
> >   def mode
> >     count = Hash.new(0)
> >     each {|x| count[x] += 1 }
> >     count.sort_by{|k,v|v}.last[0]
> >   end
> > end
>
> that's a nice way :)
>
> -- Elliot Temple
> http://www.curi.us/blog/

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