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From: "Tom Lane" <tlane@mathworks.com>
Newsgroups: comp.soft-sys.matlab
Subject: Re: Loading multiple files into a dataset
Date: Tue, 12 Jun 2012 10:38:54 -0400
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> I have a series of .txt files which contain data I would like to load into 
> MATLAB and combine to form a dataset. Each file contains 2 columns: time 
> and velocity.

Dan, take a look at "help dataset/join". You might want something like

   join(d1,d2,'key','time')

-- Tom