News for hackers. Stuff that matters.

A comment on The big six matrix factorizations.

Re:The big six matrix factorizations by howlin on Wednesday May 18, 2022 @11:53AM (#31424287)
Now apply them to the data used to identify the "Big Five" personality traits! This is an interesting application of factor analysis/matrix factorization:

https://en.wikipedia.org/wiki/Big_Five_personality_traits

[ Parent | on HN ]
Re:The big six matrix factorizations by FabHK on Wednesday May 18, 2022 @06:51PM (#31428610)
Yes, the Big Five were found by factor analysis, generally the PCA, which is basically an eigenvalue (spectral) decomposition of the (symmetric positive definite) covariance matrix of the data, which coincides with the SVD of the (normalised) data matrix.

The SVD is everywhere. IIRC, the first Netflix price was one won with the SVD:

https://en.wikipedia.org/wiki/Netflix_Prize

https://cseweb.ucsd.edu/classes/fa17/cse291-b/reading/Progre...

[ Parent | on HN ]
Re:The big six matrix factorizations by jetbooster on Wednesday May 18, 2022 @01:08PM (#31425163)
And then sell it to the Big Four!

https://en.m.wikipedia.org/wiki/Big_Four_accounting_firms

[ Parent | on HN ]
Re:The big six matrix factorizations by Royi on Wednesday May 18, 2022 @03:56PM (#31426931)
Where's the data? It could be indeed interesting.
[ Parent | on HN ]