Creating a Flag Field in Script.

[MuraliPrasath]

Hi,

I need to create a 'Flag' field in Script to apply the same in Map Object.  Then following expression is used currently in the table to get the 'Flag', need this to be at script level. Is it possible?

=if(rangesum(above(total sum(Sales)/sum(Total Sales),0,RowNo(Total)))<=0.80, '1',
if( rangesum(above(total sum(Sales)/sum(Total Sales),0,RowNo(Total)))>=0.79, '0'))

I need this flag for my Map Area Layer Background color.