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Re: Rephrase of earlier post: how might one calculate such things as cross-product matrices without storing Xs as matrices?


From   Kit Baum <[email protected]>
To   [email protected]
Subject   Re: Rephrase of earlier post: how might one calculate such things as cross-product matrices without storing Xs as matrices?
Date   Mon, 12 Jan 2009 09:36:38 -0500

<>
You might find

http://ideas.repec.org/p/boc/fsug08/7.html

helpful.

Kit

Kit Baum, Boston College Economics and DIW Berlin
http://ideas.repec.org/e/pba1.html
An Introduction to Modern Econometrics Using Stata:
http://www.stata-press.com/books/imeus.html


On Jan 12, 2009, at 02:33 , Jacob wrote:

In a previous post, I had asked how matrix accum works. Nick Cox replied that it was a very clever algorithm proprietary to Stata. Stata's awesome :)

Maybe I should rephrase my question. How might one go about calculating such things as cross-product matrices without swamping memory by storing entire lists of independent variables as matrices?

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