Message-ID: <A2E291A5-C50E-4947-85EC-D0F7B6704D02@comcast.net>
Date: 2011-12-08T00:50:11Z
From: David Winsemius
Subject: map at fips level using multiple variables
In-Reply-To: <20111207181216.ov9bliufio84k0gk@cubmail.cc.columbia.edu>
On Dec 7, 2011, at 6:12 PM, bby2103 at columbia.edu wrote:
> Hi, I just started playing with county FIPS feature in maps package
> which allows geospatial visualization of variables on US county
> level. Pretty cool.
Got code?
>
> I did some search but couldn't find answer to this question--how can
> I map more than 2 variables on US map?
"2 variables" is a bit on the vague side for programming purposes.
> For example, you can map by the breakdown of income or family size.
> How do you further breakdown based on the values of both variables
> and show them on the county FIPS level?
"breakdown" suggests a factor construct. If so, then :
?interaction
But the "show" part of the question remains very vague.
Can't you be a bit more specific? What DO you want?
--
David Winsemius, MD
West Hartford, CT