Of course it can. Use the mode() in the same way you used the mean() function.
You didn't provide a reproducible example, so I can't provided tested code, but I would think that you can add mode=mode(COUNTS) to the ddply() arguments. all1 <- ddply(all,"ACT_NAME", summarise, mean=mean(COUNTS), sd=sd(COUNTS), >>> q25=quantile(COUNTS,.25),median=quantile(COUNTS,.50), >>> q75=quantile(COUNTS,.75), >>> q90=quantile(COUNTS,.90), q95=quantile(COUNTS,.95), >>> q99=quantile(COUNTS,.99) ) On Wed, Apr 3, 2013 at 5:36 PM, Mossadegh, Ramine N. <ramine.mossad...@finra.org> wrote: > So you mean it cannot be calculated within plyer? > > -----Original Message----- > From: Sarah Goslee [mailto:sarah.gos...@gmail.com] > Sent: Wednesday, April 03, 2013 5:36 PM > To: Mossadegh, Ramine N.; r-help > Subject: Re: [R] Can package plyr also calculate the mode? > > If you type > ?mode > at an R prompt you will be able to read the help for the mode() function. > > On Wed, Apr 3, 2013 at 5:34 PM, Mossadegh, Ramine N. > <ramine.mossad...@finra.org> wrote: >> I tried mode=?mode(COUNTS) but that doesn't work. >> >> -----Original Message----- >> From: Sarah Goslee [mailto:sarah.gos...@gmail.com] >> Sent: Wednesday, April 03, 2013 5:32 PM >> To: Mossadegh, Ramine N. >> Cc: r-help >> Subject: Re: [R] Can package plyr also calculate the mode? >> >> Sure, you can add the mode in, following the format by the other summary >> statistics. >> >> ?mode >> >> Sarah >> >> On Wed, Apr 3, 2013 at 5:25 PM, ramoss <ramine.mossad...@finra.org> wrote: >>> I am trying to replicate the SAS proc univariate in R. I got most of >>> the stats I needed for a by grouping in a data frame using: >>> >>> all1 <- ddply(all,"ACT_NAME", summarise, mean=mean(COUNTS), sd=sd(COUNTS), >>> q25=quantile(COUNTS,.25),median=quantile(COUNTS,.50), >>> q75=quantile(COUNTS,.75), >>> q90=quantile(COUNTS,.90), q95=quantile(COUNTS,.95), >>> q99=quantile(COUNTS,.99) ) >>> So I got the mean, median std dev, quantiles etc. >>> >>> IS there any way I can add the mode to the mixt. Thanks ahead for any >>> suggestions. >>> >>> >>> -- Sarah Goslee http://www.functionaldiversity.org ______________________________________________ R-help@r-project.org mailing list 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.