NumPy Ninjutsu: Mastering Array Operations for High-Performance Machine Learning

Machine learning workflows typically involve plenty of numerical computations in the form of mathematical and algebraic operations upon data stored as large vectors, matrices, or even tensors — matrix counterparts with three or more dimensions.

source https://machinelearningmastery.com/numpy-ninjutsu-mastering-array-operations-for-high-performance-machine-learning/