The solution to <null> in tables

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11-28-2019 11:07 AM
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DanPatterson_Retired
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So simple.

But you have to be diligent.

Start when you first create the tables or featureclasses.

Now how many of you knew this was possible?

Solves your <null> problems since you will have to provide a valid nodata value, something which has meaning.

Python's math and numpy modules support the concept of NaN  (not a number) .

Nan's are omitted in numeric calculations by functions that ignore them... automagically... eg. mean, vs nanmean

Text... never use "" or '' because you can't see them. If you are recording textual information, provide appropriate classes like .... "never measured", "not at home", "forgot", "wasn't me", "Nadda",  or even "NONE" as text in all caps to differentiate it from the real None.

Think about this next time you decide to work with tabular data.

About the Author
Retired Geomatics Instructor at Carleton University. I am a forum MVP and Moderator. Current interests focus on python-based integration in GIS. See... Py... blog, my GeoNet blog...
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