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MathGroup Archive 2007

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Re: Re: Re: Another question on lists

  • To: mathgroup at smc.vnet.net
  • Subject: [mg80730] Re: [mg80711] Re: [mg80641] Re: [mg80618] Another question on lists
  • From: DrMajorBob <drmajorbob at bigfoot.com>
  • Date: Thu, 30 Aug 2007 02:36:00 -0400 (EDT)
  • References: <27088617.1188205442155.JavaMail.root@m35> <200708280603.CAA14009@smc.vnet.net> <11155728.1188404471045.JavaMail.root@m35>
  • Reply-to: drmajorbob at bigfoot.com

So the simplest method is

Last@Sort@sample

Bobby

On Wed, 29 Aug 2007 03:24:08 -0500, Carl Woll <carlw at wolfram.com> wrote:

> 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?
>>>
>>>
>>>
>>>
>>
>>
>>
>>
>>
>
>
>



-- 

DrMajorBob at bigfoot.com


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