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[patch #6650] one pass covariance algorithm

From: Jason H Stover
Subject: [patch #6650] one pass covariance algorithm
Date: Mon, 20 Oct 2008 15:31:01 +0000
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv: Gecko/20080702 Firefox/

Update of patch #6650 (project pspp):

                  Status:                    Done => Ready For Test/Review  


Follow-up Comment #9:

I simplified the interface to the covariance matrix struct. Please see if
this makes the code in glm.q look any easier.

I still need to fix the problem of keeping track of the sample size in the
presence of missing data. The current patch only partially implements this,
most notably in new struct covariance_matrix and in the call to
covariance_accumulate(). I'll have to tidy up other files and functions to
make it work well with missing data. So more patching will follow.

(file #16711)

Additional Item Attachment:

File name: cov3.patch                     Size:12 KB


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