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From: "Jason " <j_henderson44@REMOVEhotmail.com>
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Subject: Interpolating between 2 columns
Date: Mon, 25 Feb 2008 16:57:02 +0000 (UTC)
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Hello,

I have two columns of data

X1 = 20 21 22 23 at 2

X2 = 30 31 32 33 at 3

I want the column of data at 2.5. I'm not sure how to obtain
this using interp commands. 

Thanks in advance.