monitor_join() should handle joining a monitor with itself

MazamaScience / PWFSLSmoke

Utilities for working with air quality monitoring data (e.g. federal regulatory monitors)

http://mazamascience.github.io/PWFSLSmoke/

GNU General Public License v3.0

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Closed jonathancallahan closed 4 years ago

jonathancallahan commented 5 years ago

Joining a monitor with itself is a no-op that should just return the original monitor.

As of version 1.2.103, attempting this results in the following error:

Error in if (ncol(data) == 1) { : argument is of length zero