| avg_expression | Function to Calculate the Average of Gene Expressions | 
| check_genes_missing | Function to Check if Genes in Gene Sets Have Missing Information in Data Matrix and Direction Matrix | 
| check_genes_missing_noDir | Function to Check if Genes in Gene Sets Have Missing Information in Data Matrix | 
| check_genes_missing_total | Function to Check if 100% of Genes in Gene Sets Have Missing Information in Data Matrix | 
| check_gene_name_match | Function to Check if Gene IDs in the Input Gene Data Match Well | 
| check_gene_name_match_noDir | Function to Check if Gene IDs in the Input Gene Data Match Well When Direction Matrix Is Missing | 
| data_matrix | This is data to be included in package | 
| data_matrix_entrezID | This is data to be included in package | 
| direction_matrix | This is data to be included in package | 
| gene_sets | This is data to be included in package | 
| median_expression | Function to Calculate Median of Gene Expressions | 
| ssdGSA | Single Sample Directional Gene Set Analysis (ssdGSA) | 
| ssdGSA_individual | Single Sample Directional Gene Set Analysis Using Individual Weighted Scores | 
| ssGSA | Function to Calculate Single Sample Gene Set Scores without Direction Matrix | 
| transform_ensembl_2_entrez | Function to Transform ENSEMBL ID to ENTREZ ID |