Principal Components and Repeated Measures
Bonate, Peter, Quintiles (pbonate@qkan.quintiles.com)
Fri, 8 Jan 1999 09:20:42 -0600
I have a question. Assume you have a dataset nxp with multiple observations
from the same subject. So if I have 3 variables on 100 subjects measured 4
times, then my data matrix is 400x3. Does principal components assume that
each row is an independent observation? If I run a PC on the data set will
the principal components still be valid. I would greatly appreciate any
help you may offer in this matter. Thanks.
PETER L. BONATE, PhD.
Quintiles
POB 9627 (F4-M3112)
Kansas City, MO 64134
phone: 816-966-3723
fax: 816-966-6999
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