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MathGroup Archive 2007

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Re: How to find the index of a maximal element in a list?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg72950] Re: [mg72911] How to find the index of a maximal element in a list?
  • From: Andrzej Kozlowski <akoz at mimuw.edu.pl>
  • Date: Fri, 26 Jan 2007 06:46:31 -0500 (EST)
  • References: <200701251119.GAA19752@smc.vnet.net>

On 25 Jan 2007, at 12:19, Valter Sorana wrote:

> I may have a mental block, but I cannot find anything better than
>
> Position[listName,Max[listName]]
>
> that traverses the list twice - once to find the maximum and once  
> to find where it is.
>
> Isn't there a way to get both the index and the max value in one go?
>
> (of course one could write a loop that does this, but I want to  
> avoid loops)
>
> Thanks,
>
> Valter.
>


Probably the fastest way is:

Last[Ordering[listName]]


Andrzej Kozlowski


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