EDDTableAggregateRows should support derived variables

[BobSimons]

EDDTableFromFiles now supports derived variables https://coastwatch.pfeg.noaa.gov/erddap/download/setupDatasetsXml.html#scriptSourceNames It would be nice if EDDTableAggregateRows also supported derived variables (and perhaps also <sourceName>global:attName and <sourceName>variable:varName:attName variables).

Skills required: Java programming.

Difficulty: relatively easy. You'll have to figure out / understand how ERDDAP works, but the code to do this project is already in EDDTableFromFiles. You just need to copy and adapt it for EDDTableAggregateRows. Maybe 1 week of work after you are familiar with ERDDAP.

Mentor: Bob Simons (main author of ERDDAP)

Please also read the Programmer's Guide at https://coastwatch.pfeg.noaa.gov/erddap/download/setup.html#programmersGuide especially the "Judging Your Code Contributions" section.