Linear regression analysis

What Hacker News says

1. roadside_picnicAug 2025
   While this very much looks like AI slop, it does remind me of a wonderful little book (which has many more equations): Formulas Useful for Linear Regression Analysis and Related Matrix Theory - It's Only Formulas But We Like Them [0]

   That book is pretty much what it says on the cover, but can be useful as a reference given it's pretty thorough coverage. Though, in all honesty, I mostly purchased it due to the outrageous title.

   0. https://link.springer.com/book/10.1007/978-3-642-32931-9

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2. rwilson4Oct 2018
   I recently read Seber and Lee, Linear Regression Analysis, and highly recommend it.

   https://www.amazon.com/Linear-Regression-Analysis-George-Seb...

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3. grayclhnJun 2014
   Just to add to the other comments: you almost never want to invert the X'X matrix. (Which is k by k, where k is the number of regressors.) The QR decomposition is much more reliable. (for those that want a citation: Seber and Lee's Linear regression analysis is great.)
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