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About car efficiency... (and re: Skippy and Tyop)	by etwas_egal	2007-04-30 00:07:38
Consolidate errands	by shadowboy813	2007-04-30 06:06:51
Refinement to point 6: accelerate slower.	by etwas_egal	2007-04-30 07:46:13
No, I meant DRIVE slower for point 6	by shadowboy813	2007-04-30 10:12:30
Highway speed limits here are at your break point	by etwas_egal	2007-04-30 11:34:10
Any clustering I'm currently doing...	by shadowboy813	2007-04-30 14:20:21
I figured you would be doing something like that	by etwas_egal	2007-04-30 14:54:51
based on your field. I currently have 1500-space and 40 million records (the summary version of about two billion records). But I know I have a latent structure in what I hope is a lower-dimension space. I'm looking at SparseLib++ with sparse-BLAS among other things, since most of the records have a substantial number of zeros (or missing :( ). Thought I'd check to see if there was another good package. I'm probably going to be starting with a simple principle components and support vectors, and see if that reveals enough to get a better idea going from there. But in any case, I'm having a hard time coming up with a meaningful measure of "goodness-of-dimensionality" since percent of variance explained just doesn't tell me if I have retained the power I will need in the final structure. sigh
[ Reply ]
Well, as you can imagine, my matrices are dense	by shadowboy813	2007-04-30 16:55:25

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