Comment by magicalhippo

FWIW I found it quite straight forward. But then I did have some linear algebra back at uni.

That said I do think it's a good habit to either write out abbreviations in full or link to say Wikipedia, eg for PCA[1]. It's a well-known tool but still if you come from a slightly different field it might not ring a bell.

[1]: https://en.wikipedia.org/wiki/Principal_component_analysis