Re: [R] Equivalent to a BY command in SAS

From: Michael Kubovy <>
Date: Mon, 14 Apr 2008 09:37:42 -0400

You might also take a look at the doBy package.

On Apr 14, 2008, at 7:30 AM, zerfetzen wrote:

> Thanks all. I will try to use both tapply and by, and have no idea
> how I
> missed the by function. Thanks again.

Professor Michael Kubovy
University of Virginia
Department of Psychology
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