[R] Failure to aggregate

[Dimitri Shvorob]

Update: What did make a difference for me - and something that was present in
Jim's example, but not reproduced by myself initially - was dropping columns
other than the two involved. When I dropped all columns except for h and
src, the sqldf call worked.

... Is it an R bug or what? (I am saying R, not sqldf, because built-in
tapply did not work either). Arrgh...

 
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