Find Genes in the top nth quantile for CNA Signal values
     
    cnaHotspotGenes(cna, threshold)
    Arguments
    
    
    
      | cna | 
      a matrix of gene rows by cell columns containing CNA values  | 
    
    
      | threshold | 
      PARAM_DESCRIPTION  | 
    
    
    Value
    gene names in the top nth quantile, where n is specified via <threshold>