editor.edit().set().update() to update a field in row

Olan

I want to update a field in the selected row when ik click on a tabletools button. I think it is something with
editor
.edit()
.set()
.submit()

but I cannot figure out how to do this. Anyone?

ThomD

Merit2015 is the field I'm updating in this example.

        dtEditor
            .edit( dtTable.row(rowkey) , false)
            .set( 'Merit2015', amount )
            .submit();