[R] Can package plyr also calculate the mode?

Sarah Goslee sarah.goslee at gmail.com
Wed Apr 3 23:35:49 CEST 2013

If you type
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.Mossadegh at finra.org> wrote:
> I tried mode=?mode(COUNTS) but that doesn't work.
> -----Original Message-----
> From: Sarah Goslee [mailto:sarah.goslee at 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.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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