Thanks for the cross-references, that was super helpful!
On close inspection, I think that post is only implying that categorical values should be used in the dendrogram-heatmap method:
It sounds like the numerical values in the gradient-clustering command weren’t really part of the question in that original thread (“Appears to work for the gradient-clustering command” sounds to me like their numeric pH column worked without modification). I had to read the post a few times to get it straight in my head, so please double-check me, I might’ve missed something!
See my interpretation above, I don’t think this was ever possible, with respect to gradient-clustering.
This will probably be your best bet moving forward, although you don’t need to remove your existing column, you could just define a new column and point gneiss gradient-clustering to that new column!
Hope that helps!
(Matthew Ryan Dillon)