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Subject [GitHub] [spark] srowen commented on issue #16556: [SPARK-19184][MLlib] Improve numerical stability for method tallSkinnyQR.
Date Mon, 16 Sep 2019 22:16:37 GMT
srowen commented on issue #16556: [SPARK-19184][MLlib] Improve numerical stability for method
tallSkinnyQR.
URL: https://github.com/apache/spark/pull/16556#issuecomment-531979613
 
 
   Hm, I haven't thought about it enough then, but as the # cols increases isn't R less likely
to be singular? doesn't really matter though. Simple is better than complex, if it fixes it,
but if not, yeah something like this may be needed.
   
   To be clear, nobody thinks this is the best way to do it. It's just what was implemented
so far. To your question of why it hasn't been improved, ¯\_(ツ)_/¯ ? that's OSS. It happens
by people doing it.

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