Re: How to find the index of a maximal element in a list?
- To: mathgroup at smc.vnet.net
- Subject: [mg72943] Re: [mg72911] How to find the index of a maximal element in a list?
- From: Carl Woll <carlw at wolfram.com>
- Date: Fri, 26 Jan 2007 06:18:26 -0500 (EST)
- References: <200701251119.GAA19752@smc.vnet.net>
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.
>
>
Use Ordering:
lst={1,2,10,2};
Ordering[lst,-1]
{3}
Finding the max value using Part once the index is known is practically
instantaneous.
Carl Woll
Wolfram Research
- References:
- How to find the index of a maximal element in a list?
- From: Valter Sorana <vsorana@yahoo.com>
- How to find the index of a maximal element in a list?