On Nov 21, 2009, at 8:41 PM, David Winsemius wrote:
On Nov 21, 2009, at 7:58 PM, chloe yoon wrote:
hello,
I am trying to do exploratory factor analysis with BRFSS dataset (
http://www.cdc.gov/brfss/technical_infodata/surveydata/2008.htm)
for a
couple of days, but I was not able to do that and got frustrated. Can
anybody help me with step by step guide? BRFSS dataset provides
ASCII or SAS
format.
I am not sure I have the time to create a step by step guide for a
dataset that is 47 MB long which I don't intend to use. I have
experience with loading datasets from NCHS from NHANES. Which
dataset do you intend to use? Perhaps if you posed more discrete
questions, then people could chime in as you proceeded stap by step.
The data layout for the ASCII data is described on:
http://www.cdc.gov/brfss/technical_infodata/surveydata/2008/varLayout_table_08.htm
So it looks like you will be using either read.sas or read.fwf? Have
you tried either one? What experiences or preparation have you you
to report?
Actually, that would be foreign:::read.xport, not read.sas.
After downloading andunzipping the sas xport file, the following
worked fairly painlessly. There would also be the option of using
Hmisc:::sasxport.get
library(foreign)
brfss <- read.xport("/Users/davidwinsemius/Downloads/CDBRFS08.XPT")
--
David Winsemius, MD
Heritage Laboratories
West Hartford, CT
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