A tutorial on array math with matrix multiplication examples and the inverse matrix for matrix division, the transpose matrix for array alignment and the identity matrix in a Quant 101 data analytics course. For the full video transcript and formulas see: https://factorpad.com/fin/quant-101/array-math.html Zoom straight to the section you are interested in here: 00:45 - Video Outline 01:10 - Step 1 - Conventions with Linear Algebra 03:32 - Step 2 - Types of Arrays 04:26 - Step 3 - Array Math Operations 15:29 - Step 4 - Helpful Tips for Excel 17:25 - Summary 18:15 - Step 5 - Next: Portfolio Algebra For the outline to the whole playlist see: https://factorpad.com/fin/quant-101/quant-portfolio-management.html See hundreds of tutorials on a web page here: https://factorpad.com/ Happy Learning!