[R] Can package plyr also calculate the mode?

Sarah Goslee sarah.goslee at gmail.com
Wed Apr 3 23:32:17 CEST 2013

Sure, you can add the mode in, following the format by the other
summary statistics.



On Wed, Apr 3, 2013 at 5:25 PM, ramoss <ramine.mossadegh at 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

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