My understanding of principal component analysis is Wobbly. It’s a good understanding but it Wobbles…

This tutorial seemed to help: PCA Tutorial mostly because it did not lean too heavily on the maths, the language was clear and they gave a worked example.

I have a suspicion, though, that I am going to have to look PCA up every time I have a protocol that touches on it. Part of me feels that this is like needing to look up the definition of standard deviation every time it comes up, but having said that… I would probably only be able to give you the correct equation straight away on a Very Good Day.

I suppose that there are a lot of brilliant people for whom this is not true: but for me, at least, maintaining my understanding of “concepts” requires quite a lot of time. Otherwise, it wobbles. It’s good, but it wobbles.