calculateRSS: Calculate RSS matrix
In maplesword/RefSimSpec:

This function calculates the Reference Similarity Spectrum (RSS) matrix, based on the given input matrix and the reference data set matrix.

1 2	calculateRSS(input, ref, method = "pearson", scale = TRUE, threads = 1)

`input`	The input expression matrix, assuming its rows as genes and columns as samples. Its rows are expected to be named by the same types of gene representative (e.g. ENSEMBL IDs) as ref.
`ref`	The reference expression matrix, assuming its rows as genes and columns as samples.
`method`	The type of correlation to calculate. It allows any method used in the cor function.
`scale`	When it is TRUE, similarities of one sample (cell) in the input matrix across the reference samples are central-scaled transformed.
`threads`	The number of threads to calculate correlations.