---
title: "SU-CS229 JAN082025"
source: https://www.jemoka.com/posts/kbhsu_cs229_jan082025/
date: 2025-01-08
---

Notation New Concepts supervised learning training set cost function least-squares error machine learning evaluation root-mean-square error (this is least-squares error with normalization, so &ldquo;units work well&rdquo; for test benchmarks) linear regression gradient descent stochastic gradient descent normal equation Important Results / Claims gradient descent for least-squares error when does gradient descent provably work? Questions Why can&rsquo;t we use root-mean-square error for the training objective? It seems like its just more normalization&hellip;
