Andrew Ng's Machine Learning Course in Python (Neural Networks)

Before getting into neural networks, let's complete the last section for logistic regression -- Multi-class Logistic Regression. This series of exercise make use of a handwritten digits dataset that consists of 5000 training examples, where each example is a 20 pixel by 20 pixel grayscale image of the digit. Since the dataset was given in .mat The official documentation can be found here. To better understand the dataset, having the shape of the data tells us the dimension of the data.