how to use the result of a calculated expression column in a straight table - as a dimensionless for a line chart

[#1]

Dear, All.

i have some dimensions:

id

starttime

endtime

when i put them in a straight table, i can calculate the the current starttime-endtime of the previous row with the expression:

column(1)-above(column(2)).

I would have some help how to use this calculated column as a dimention for a line chart (for class function use).

Thanks,

Moti

[m_woolf]

You should probably do the calculation in script.

[vinieme12]

Add a calculated dimension

=AGGR( YourExpression, Id)