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The last line of the example in droplevels' manual page seems to be incorrect to me. I think it should read: "table(droplevels(aq$Month))". Amazingly (I don't understand) both variants seem to produce the same result (R 3.3.3): --- > aq <- transform(airquality, Month = factor(Month, labels = month.abb[5:9])) > aq <- subset(aq, Month != "Jul") >

...Let's keep the discussion on-list -- I've added back R-devel.) > > On 2017-04-12 16:39, Ulrich Windl wrote: > >>>>> Henric Winell <nilsson.henric at gmail.com> schrieb am 12.04.2017 >>>>> um 15:35 in >> Nachricht <b66fe849-bb8d-f00d-87e5-553f866d57e0 at gmail.com>: >>> On 2017-04-12 14:40, Ulrich Windl wrote: >>> >>>> The last line of the example in droplevels' manual page seems to >>>> be incorrect to me. I think it should read: >>>> "table(droplevels(aq$Month))". Amazingly...

(Let's keep the discussion on-list -- I've added back R-devel.) On 2017-04-12 16:39, Ulrich Windl wrote: >>>> Henric Winell <nilsson.henric at gmail.com> schrieb am 12.04.2017 >>>> um 15:35 in > Nachricht <b66fe849-bb8d-f00d-87e5-553f866d57e0 at gmail.com>: >> On 2017-04-12 14:40, Ulrich Windl wrote: >> >>> The last line of the example in droplevels' manual page seems to >>> be incorrect to me. I think it should read: >>> "table(droplevels(aq$Month))". Amazingly (I don't unde...

...evel.) >> >> On 2017-04-12 16:39, Ulrich Windl wrote: >> >>>>> Henric Winell <nilsson.henric at gmail.com> schrieb am >> 12.04.2017 >>>>> um 15:35 in >>> Nachricht >>> <b66fe849-bb8d-f00d-87e5-553f866d57e0 at gmail.com>: >>>> On 2017-04-12 14:40, Ulrich Windl wrote: >>>> >>>>> The last line of the example in droplevels' manual >>>>> page seems to be incorrect to me. I think it should >>>>> read: "tab...