Lesson 21 Joining NumPy Arrays in Machine Learning

In this video I will show you how to join multiple arrays together using Concatenate function in Python NumPy for Machine Learning. Joining means putting contents of two or more arrays in a single array.
In SQL we join tables based on a key, whereas in NumPy we join arrays by axes. We pass a sequence of arrays that we want to join to the concatenate() function, along with the axis. If axis is not explicitly passed, it is taken as 0.