摘要： 1. Convex and concave functions Concave is the upside-down of the convex function and convex is a bow-shaped function 2. Stepsize common choice: as th 阅读全文

摘要： 1. Multiple Features note:X0 is equal to 1 2. Feature Scaling Idea: make sure features are on a similiar scale, approximately a -1<Xi<1 range For exam 阅读全文

摘要： 1.Linear Regression with One variable Linear Regression is supervised learning algorithm, Because the data set is given a right answer for each exampl 阅读全文