Hi, Do not use looping. Ferret's power is in working with entire grids in a few commands. This is something you can do by defining the new time axis having time steps of 120 years, and regridding the data to that new axis using the @AVE regridding transformation. We encourage Ferret users to start to learn how Ferret works by reading through the first chapter of the documentation. The section called "thinking like a Ferret" has a useful description of the way that Ferret works. In addition, try running the demo script, yes? go regridding_demo The examples there are not the same as what you describe, but they show the sequence of looking at the grid of your data, defining a new axis, and defining the new variables with a regridding transformation onto that new axis. Ansley On 4/2/2013 2:01 PM, Star Physicist
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