Open the first grid
then open the second grid
This command is similar to Consensus
except that instead of adding two or more grids for a CONSENSUS analysis
SUB subtracts two "un-centered" un-weighted grids to give a DIFFERENCE
analysis showing the uncommon features. The textual interpretations at
this stage are not complete for DIFFERENCE analysis and allowance must
be made during your own interpretations.
FrominGridX 0.9.2 there is the ability to divide the first grid by the
second instead of subtracting. This creates a time based form of auto-scaling
which is useful in normalizing otherwise disparate data.