Hello everyone,
An additional question on PCA....
My variables are measured in different units and some are binary, some
continuous and some ordinal. Am I correct in thinking that a
'correlation' based PCA is appropriate (i.e. using standardised data)?
Many thanks again,
Kim.
-----Original Message-----
From: A UK-based worldwide e-mail broadcast system mailing list
[mailto:[log in to unmask]] On Behalf Of K F Pearce
Sent: 12 January 2005 14:50
To: [log in to unmask]
Subject: PCA
Dear all,
A quick query on PCA.
I know that we get good PCA results when the variables are highly
correlated...but can we enter variables which 'tell the same story'
e.g.
Variable 1
'Have you produced an academic paper in the last year?' (Yes/No),
Variable 2 'what was your highest contribution to any academic paper in
the last year?' (None/Minor/Moderate/Major)
Could these 2 variables both be entered into a PCA?
Many thanks,
Kim.
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