I am trying to cluster single cells using the ADT reads from the CITEseq (generated with the 10x platform). Ideally, I would like to use the information from two ADT features. I have tried the kmeans function on a count matrix of the two antibodies in order to make 3 clusters (number pre-defined) but this doesn't seem to work. Is there any way to do that? Any suggestion would be appreciated. Thanks a lot!