# Concise notes and tutorials for continuous learning.

**Tutorials:**

**Popular Topics:**

#### What is Machine Learning?

Two definitions of Machine Learning are offered. Arthur Samuel described it as: "the field of study…

#### Supervised Learning

In supervised learning, we are given a data set and already know what our correct output should look…

#### Unsupervised Learning

Unsupervised learning allows us to approach problems with little or no idea what our results should…

#### Matrices and Vectors

Matrices are 2-dimensional arrays: The above matrix has four rows and three columns, so it is a 4 x…

#### Addition and Scalar Multiplication

Matrix addition Addition and subtraction are element-wise, so you simply add or subtract each…

#### Matrix Multiplication

Matrix-Vector Multiplication We map the column of the vector onto each row of the matrix…

#### Identity Matrix

The identity matrix, when multiplied by any matrix of the same dimensions, results in the original…