If the operations on the data are more convenient as array rather than as separate variables, then create the table variable as an array instead --
A2=table(A);
If there are specific reasons for keeping separate columns because most is column/variable related but there's the occasional array operation, you can retrieve the desired columns as array--
A2=table(Col1,Col2,Col3);
a=A{:,1:3};
and a is the array equivalent to A above to operate on and then put result back into the table.
