#1 add calculated field surpport

[Creatxr]

I wish it has calculated fields.

such as : calculate columns[index]
∑column1

calculate rows[index]
∑row1

calculate some cells and put its result to a specified cell
for exmples:

x(1) + y(1) = xy(1,1);
x(5) + y(3) = xy(5,3);

xy(m,n) + xy(k,n) = xy(h,n)

∑y(1) = y(max index)
∑x(3) = x(max index)