Normal Equation Derivation

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This is a video I recorded a few years back for my Astrostatistics class at Columbia University on how to derive the Normal Equation used in linear regression. I figured I'd share it as I haven't posted here in a while and hopefully this is helpful to others struggling with the origins of this important equation.
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Everyone with an interest in the machine learning world should absorb this video. It’s the same stuff we have to do when measuring training and validation loss. Thanks for putting this out in such an easy to understand manner!

wholenutsanddonuts
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at 11:22 how can you drop the transpose?

ericma
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As a 35 year old man who struggles with pre algebra, I felt like a child listening to grown ups talk. Still watched the whole thing though.

anbu
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cool. i can use this for AI and gaming performance.

PrimordialOracleOfManyWorlds