3.3.2 Difference Calculation

This simple field differencing algorithm can be used to compute the difference between a single variable at two different levels, or between two different variables at the same level. Of course, you could compute the difference between different variables at different levels, but you would really have to ask yourself why you are spending time doing that. The input and output identifiers must be the names of the variables contained in the primary input file on the page, See File io page.