Sanj's Notes

Matrix Multiplication


July 25, 2020
categories: Math
tags: Matrix, Dimensions

Check Dimensions #

  1. Inner two numbers must match1
  2. Outer two numbers = answer’s dimensions
\[(\underbrace{2 \times \underbrace{3) \times (3}_{\text{must match}} \times 2}_{\text{answer's dimensions}})\]

Multiply #

Dot product2 each row in the 1st matrix with every column in the 2nd matrix.

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July 25, 2020