abundance projection has also been useful over in sourmash, in which the abundances from one set of k-mers are projected onto the (flat) k-mers from another; the specific use case in sourmash has been to support reference genome abundance estimation in metagenomes. we might do something similar here.
these are both calculated in sourmash, albeit for FracMinHash sketches.
ref for angular similarity: wikipedia
abundance projection has also been useful over in sourmash, in which the abundances from one set of k-mers are projected onto the (flat) k-mers from another; the specific use case in sourmash has been to support reference genome abundance estimation in metagenomes. we might do something similar here.