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

• To: mathgroup at smc.vnet.net
• Subject: [mg114213] How do I take every 3rd number from a text file?
• From: cubsfan334 <cubsfan334 at gmail.com>
• Date: Sat, 27 Nov 2010 03:37:16 -0500 (EST)

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