there are some way to change dynamically VBarModelMapper ??

[gfxx]

I use VBarModelMapper for show a vertical bar chart ...

                        VBarModelMapper {
                            model: mymodel /* is came from SqlModelMapper, it bring data from table with 30column */
                            firstBarSetColumn: 0
                            lastBarSetColumn: 5
                            firstRow: 0
                          }

but in these way I can change only firstBar and lastBar .... I need to show data from column 1, 2, 3 plus 10,11,18 for example ..... there are some way to do these?
I see nothing about in document or example ..... any suggest is appreciate.

regards