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st: Re: st: 答复: st: generate random data referring to given covariance matrix
From
Maarten Buis <[email protected]>
To
[email protected]
Subject
st: Re: st: 答复: st: generate random data referring to given covariance matrix
Date
Tue, 27 Aug 2013 13:07:29 +0200
I assume you mean means of 0 and standard deviations of 1. Anyhow the
help file of -drawnorm- contains a couple of examples that show how to
create such data. After that, you can look at the helpfile for
-simulate- for tricks on how to do the simulation.
-- Maarten
On Tue, Aug 27, 2013 at 12:32 PM, Rubi Lam wrote:
> Assuming that all the variables follow normal distribution with means at 1
> and standard deviations at 0, I attempt to a simulation of PCA or Factor
> Analysis with the precondition that some of them have strong correlation
> while others do not. Also, I have to predict several main factors within the
> variables.
> That why I need to pre-set a variance matrix.
---------------------------------
Maarten L. Buis
WZB
Reichpietschufer 50
10785 Berlin
Germany
http://www.maartenbuis.nl
---------------------------------
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