I have a shapefile with numerous columns that I need to calculate a mean for on a row by row basis. Within the data there are a lot of values equal to 0 that are skewing the mean - how can I set up a calculation in the ExpressionEvaluator to remove the 0's from my calculation?
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How can I set up a calculation to ignore values equal to 0 when calculating the mean?
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Best answer by dustin
Nulls would not be evaluated in that situation, so I would use a NullAttributeMapper prior to the ExpressionEvalutor setting all 0's to <null>. Then after your ExpressionEvaluator, use another NullAttributeMapper to set <null> back to 0's.
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Nulls would not be evaluated in that situation, so I would use a NullAttributeMapper prior to the ExpressionEvalutor setting all 0's to <null>. Then after your ExpressionEvaluator, use another NullAttributeMapper to set <null> back to 0's.