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As an exercise to put all of this together, we will write a new macro to compute the precipitation rate in mm per hour at a particular location for each time period. WeThis could be a little complicated, so we'll do it step by step.

Compute the 'period' precipitation from precip.grib

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We will obtain the date for each field of the original precipitation fieldset and add it to the list. We need to loop through the fields (- we should already have n defined as the number of fields from the previous exercise):

dates = nil
for i = 1 to n do
   print(i) # we will put proper code here in the next step!
end for

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