Re: Find index of maximal element in multi-dimensional array
- To: mathgroup at smc.vnet.net
- Subject: [mg73539] Re: Find index of maximal element in multi-dimensional array
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Wed, 21 Feb 2007 01:51:33 -0500 (EST)
- Organization: Uni Leipzig
- References: <erelbt$7h4$1@smc.vnet.net>
- Reply-to: kuska at informatik.uni-leipzig.de
Hi,
Position[z, Max[Flatten[z]]]
??
Andrew Moylan wrote:
> Hi all,
>
> Here's a two-dimensional array of numbers:
>
> z = Table[Random[], {5}, {6}]
>
> What's an efficient way of finding the index of the maximal element of
> z? Here's one way:
>
> Last[Sort[Flatten[MapIndexed[{#2, #1} & , z, {2}], 1],
> OrderedQ[{#1[[2]], #2[[2]]}] & ]]
>
> The output is like this:
>
> {{5, 4}, 0.921344}
>
> But it's so untidy. Any better ideas?
>
> Cheers,
>
> Andrew
>
>