The cell filter should be used if the quality of data is low, i.e. if one
suspects that some of the cells may be technical outliers with poor coverage.
The cell filter removes cells containing fewer than cell.filter.genes.
Usage
cell_filter(data, cell.filter.genes)
Arguments
data
expression matrix
cell.filter.genes
minimum number of genes that must be expressed in
each cell, default is 2,000.