by Function Result Factor Levels

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by Function Result Factor Levels

 Good day, How is it possible to get a data.frame of factor levels used for obtaining each element of the result of the by function ? For example, result <- by(warpbreaks[, 1],   warpbreaks[, -1], summary) > result wool: A tension: L    Min. 1st Qu.  Median    Mean 3rd Qu.    Max.   25.00   26.00   51.00   44.56   54.00   70.00  ... I'd like to obtain a data.frame of the two columns, wool and tension, specifying the level of each factor that corresponds to each element of result. -------------------------------------- Dario Strbenac PhD Student University of Sydney Camperdown NSW 2050 Australia ______________________________________________ [hidden email] mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-helpPLEASE do read the posting guide http://www.R-project.org/posting-guide.htmland provide commented, minimal, self-contained, reproducible code.
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Re: by Function Result Factor Levels

 Do you want something like the following? > library(dplyr, quietly=TRUE, warn.conflicts=FALSE) > warpbreaks %>% group_by(wool, tension) %>% summarize(Min=min(breaks), Median=median(breaks), Max=max(breaks)) Source: local data frame [6 x 5] Groups: wool   wool tension Min Median Max 1    A       L  25     51  70 2    A       M  12     21  36 3    A       H  10     24  43 4    B       L  14     29  44 5    B       M  16     28  42 6    B       H  13     17  28 Bill Dunlap TIBCO Software wdunlap tibco.com On Tue, Sep 15, 2015 at 7:00 PM, Dario Strbenac <[hidden email]> wrote: > Good day, > > How is it possible to get a data.frame of factor levels used for obtaining each element of the result of the by function ? For example, > > result <- by(warpbreaks[, 1],   warpbreaks[, -1], summary) >> result > wool: A > tension: L >    Min. 1st Qu.  Median    Mean 3rd Qu.    Max. >   25.00   26.00   51.00   44.56   54.00   70.00 >  ... > > I'd like to obtain a data.frame of the two columns, wool and tension, specifying the level of each factor that corresponds to each element of result. > > -------------------------------------- > Dario Strbenac > PhD Student > University of Sydney > Camperdown NSW 2050 > Australia > > ______________________________________________ > [hidden email] mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html> and provide commented, minimal, self-contained, reproducible code. ______________________________________________ [hidden email] mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-helpPLEASE do read the posting guide http://www.R-project.org/posting-guide.htmland provide commented, minimal, self-contained, reproducible code.