getSimilarity: Compute similarity matrix
In lingxuez/SOUP: Semi-soft Clustering of Single Cell Data

Compute the cell-cell similarity matrix.

1	getSimilarity(expr, type = "log")

`expr`	a cell-by-gene expression matrix, either the raw counts or log-transformed expressions.
`type`	"log" if `expr` has been normalized and log-transformed (default), or "count" if `expr` contains the raw counts.
`method`	the method to measure similarity between cells, one of {"cov", "cor", "inner},