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rpmatch
2009 Sep 24
2
aggregate() - error message
Dear list,
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would anybody be able to tell me why the statement
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Tripstatistics=aggregate(TripsData[2:3],by=list(Trip=Tripmatch),FUN="mean")
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seems to work well with TripsData 1 but not with TripsData 2 ?
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With TripsData 2 it yields
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Error in FUN(X[[1L]], ...) : arguments must have same length
I can't see a difference in the two data sets. Could someone shed light on the error message ??Maybe that would h...