Re: Re: Another question on lists
- To: mathgroup at smc.vnet.net
- Subject: [mg80711] Re: [mg80641] Re: [mg80618] Another question on lists
- From: Carl Woll <carlw at wolfram.com>
- Date: Wed, 29 Aug 2007 04:24:08 -0400 (EDT)
- References: <27088617.1188205442155.JavaMail.root@m35> <200708280603.CAA14009@smc.vnet.net>
DrMajorBob wrote: >Here's an example: > >sample = Array[ > RandomInteger[{1, 10}, {RandomInteger[{3, 10}]}] &, {15}] >Length /@ % > >{{5, 7, 7, 1, 2, 5, 2, 7, 3}, {3, 4, 3, 8, 8}, {1, 4, 6, 6, 1, 6, > 3}, {4, 6, 1, 9, 9, 7, 3, 5, 10}, {9, 1, 4, 2, 7, 1, 5}, {2, 8, 2, > 4, 7, 3, 8}, {2, 10, 4, 7, 2, 10, 3}, {10, 5, 10, 6, 5, 10, 4, 3, > 4}, {5, 2, 3, 10, 8}, {5, 1, 7}, {1, 5, 8, 4, 8, 5, 8, 2}, {3, 3, 8, > 5, 1, 7}, {6, 10, 1, 6, 3, 5, 7, 6, 1, 7}, {3, 5, 1, 6, 6}, {10, > 10, 9, 3, 9}} > >{9, 5, 7, 9, 7, 7, 7, 9, 5, 3, 8, 6, 10, 5, 5} > >Last@SortBy[sample, Length] > >{6, 10, 1, 6, 3, 5, 7, 6, 1, 7} > >or > >sample[[Ordering[sample, -1, Length[#1] < Length[#2] &]]] > >{{6, 10, 1, 6, 3, 5, 7, 6, 1, 7}} > > Just a minor comment that the third argument of Ordering is not needed in this case, since the default order used sorts by length of list first. Try: sample[[Ordering[sample,-1]]] instead. Carl Woll Wolfram Research >Bobby > >On Sun, 26 Aug 2007 22:20:22 -0500, Mauricio Esteban Cuak ><cuak2000 at gmail.com> wrote: > > > >>Hello again.Thank you very much for your previous help. However, I >>seem to stumble on another rock: >> >>I have a list of n sub-lists with different number of elements. I >>want to select the list with the highest number of elements. >>I tried to combine the Select function with Lenght but couldn't do it: >> >>Select[list, Length /@ list >= Max[Length /@ list] &] >> >>Thanks for reading. >> >>Regards, >> >>cd >> >>P.D.: Any tips,websites, books, on how to learn some basic programming >>on Mathematica? >>I'm slowly beginning to read "The Mathematica Book"...should I just >>concentrate on that? >> >> >> >> > > > > >
- References:
- Re: Another question on lists
- From: DrMajorBob <drmajorbob@bigfoot.com>
- Re: Another question on lists