Julia for Beginners by Erik Engheim

Author:Erik Engheim
Language: eng
Format: epub
Publisher: Leanpub
Published: 2021-03-10T00:26:18+00:00

Vector Dot Product and Cross Product

So far we have looked at adding and subtracting vectors as well as multiplying them with a scalar or with a matrix. However we have not actually looked at multiplying vectors with each other.

You can fake it by multiplying a row vector with a column vector. However this is really just matrix multiplication for matrices which are single rows or columns.

But how about multiplying two row vectors or two column vectors? Is there a sensible definition of how that should behave, and which has a sensible geometric interpretation?

In this case the math and physics guys came up with two different ways of doing it:

Dot product

Cross product

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