compute.jsd: 5. compute the specificity of gene set when cell partition information is available;
the information could be clustering, sample origins, or other conditions
inspired by https://github.com/FloWuenne/scFunctions/blob/0d9ea609fa72210a151f7270e61bdee008e8fc88/R/calculate_rrs.R
Description
this function is called by compute.spec.single to calculate the similarity
between two vectors
Usage
# S3 method for jsd
compute(x, y)
Value
returns jsd_distance