Collapsed N-tuples

Collapsed n-tuples always have at most one row. Each column holds the sum, ignoring undefined values, of all the rows generated. The system creates a bank in a permanent division of the ZEBRA memory to hold the running sums and then outputs this bank during the termination phase. Collapsed n-tuples can produce histograms if required. See section 6.8

To make a collapsed n-tuple, just set the appropriate bit on the NTPR options word. This feature can be used by the Run Logger as part of the run summary, but there is probably little use of collapsed n-tuples beyond this application.