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MathGroup Archive 2007

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Re: Selecting Sub-lists After Split

  • To: mathgroup at smc.vnet.net
  • Subject: [mg77470] Re: Selecting Sub-lists After Split
  • From: Adriano Pascoletti <adriano.pascoletti at gmail.com>
  • Date: Sat, 9 Jun 2007 05:40:17 -0400 (EDT)
  • References: <f4b89h$3ls$1@smc.vnet.net>

On 8 Giu, 11:42, Gregory Lypny <gregory.ly... at videotron.ca> wrote:
> Hello everyone,
>
> Suppose I have a list of real number called myList.  I split it into
> sub-lists of positive and negative numbers called myNewList by doing
> this (there may be a more elegant way):
>
> myNewList = Split[myList, #1 #2 > 0 &]
>
> Now, how can I select all of the sub-lists of negative numbers from
> myNewList?
>
> Any tips would be most appreciated.
>
> Regards,
>
>         Gregory

Select[myNewList, First[#] < 0 &]

Adriano Pascoletti



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