MXAGG mstack magg (L/B N1 N2
Outputs an aggregated matrix magg.ufm from a stacked and/or blocked matrix mstack.ufm by aggregating (i.e., adding together various cell values) together ranges of levels and/or blocks.
If “L” is included in the command line then levels are aggregated but not blocks and the output matrix contains a single level and the same number of input blocks. If “B” is included then blocks are aggregated but not levels and the output matrix contains a single block and the original levels. If neither L nor B appears then (the default) both levels and blocks are aggregated and the output matrix is square.
N1, N2 … identify selected range of levels or blocks to be aggregated. Thus, for example, B 2 4 indicates that blocks 2 to 4 are to be included in the aggregated matrix but block 1 and any blocks beyond 4 are ignored.
See 10.2.4 and 10.4.2.