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Re: New function
From: |
Jason Stover |
Subject: |
Re: New function |
Date: |
Fri, 27 Mar 2009 10:39:06 -0400 |
User-agent: |
Mutt/1.5.18 (2008-05-17) |
On Thu, Mar 26, 2009 at 03:03:16PM -0300, Michel Boaventura wrote:
> > It was until I made a bunch of changes to incorporate categorical
> > variables and interactions. I'm fixing that now.
>
> I was thinking about it on my work. How do you treat categorical
> variables on singular value decomposition?
They must be written as binary vectors, or vectors containing cell
counts. So, for example, a variable with values 'a', 'b' and 'c' must
be encoded as:
a --> (0,0)
b --> (1,0)
c --> (0,1)
-Jason