| excelOutput | Helper function for using jexcel table in Shiny | 
| excelTable | Create excel table using jexcel library | 
| excel_to_R | Convert excel object to data.frame | 
| getComments | This function is used to get comment from specified cell | 
| get_selected_data | Get selected cells from excel table | 
| get_selected_data_boundary | Get selected cells boundary from excel table | 
| renderExcel | Helper function for using jexcel table in Shiny | 
| setComments | Add comment to a specified cell |