And you can define a Macro to do this:
def copycol
{
set %2 -begin 0;
set %2 -end 0; // set begin & end to 0 in order to clear existing data
%2 = %1; // copy data from one column to another column
};
copycol data2_A data1_A;
copycol data2_B data1_B;
Iris