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MathGroup Archive 2010

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Re: How do I take every 3rd number from a text file?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg114247] Re: How do I take every 3rd number from a text file?
  • From: Peter Breitfeld <phbrf at t-online.de>
  • Date: Sun, 28 Nov 2010 06:55:41 -0500 (EST)
  • References: <icqfve$m3o$1@smc.vnet.net>

cubsfan334 wrote:

> Hi,
>
> I've been reading in text files using the following command:
>
> ReadList["file.txt", Word]
>
> However, now I only want to read in every 3rd number, starting with
> the valueI specify.
>
> For example, say I had these values:
>
> 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
>
> How would I read in every third number, starting with the second
> integer?  So the result would look like this:
>
> 1, 4, 7
>

ll=Range[0,9]
Table[ll[[i]],{i,2,Length[ll],3}]

-- 
_________________________________________________________________
Peter Breitfeld, Bad Saulgau, Germany -- http://www.pBreitfeld.de


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