training set

Preliminaries Linear Algebra(the concepts of space, vector) Calculus An Introduction to Linear Regression Notations of Linear Regression1 We have already created a simple linear model in the post “An Introduction to Linear Regression”. According to the definition of linearity, we can develop the simplest linear regression model: $$Y\sim w_1X+w_0\tag{1}$$ where the symbol $\sim$ is read as “is approximately modeled as”. Equation (1) can also be described as “regressing $Y$ on $X$(or $Y$ onto $X$)”....