At first, I did a version of this exclusively for the balcony seats, using their Z values to separate one row from another before sorting by their Y value… Then the light bulb went on - I could do this for all rows!! (white group) MIndex to the rescue (link), except for one very bad point that had a spurious Z value, repaired in the yellow group.
SeatsNumbering_2020Aug28d.gh (25.9 KB)
To be a little more robust, I added a “round(x,1)” expression to the first pDecon ‘Z’ output.
SeatsNumbering_2020Aug28dd.gh (24.6 KB)