Excellent, new to me and I'll give it a go, thanks! I gravitate to PCA for terrible reasons (undergrad so it's what I think of first) and like you say, it's be

Excellent, new to me and I'll give it a go, thanks! I gravitate to PCA for terrible reasons (undergrad so it's what I think of first) and like you say, it's beguiling yet disappointing, the components rarely have any human meaning.