[R] find multiple mode

Abby Spurdle @purd|e@@ @end|ng |rom gm@||@com
Sun Mar 15 23:42:37 CET 2020

```I think people have misinterpreted the question.
The OP wants local maxima from the series.

The original series is frequencies, so your table is frequencies of frequencies.

A solution can be derived by looking at signs of the first and second
differences.
But there may be a simpler way????

On Mon, Mar 16, 2020 at 10:24 AM Jim Lemon <drjimlemon using gmail.com> wrote:
>
> Hi Ding,
> Translating this into R code:
>
> freq<-c(1,2,5,5,10,4,4,8,1,1,8,8,2,4,3,1,2,1,1,138,149,14,1,1)
> > table(freq)
> freq
>  1   2   3   4   5   8  10  14 138 149
>  8   3   1   3   2   3   1   1   1   1
> > library(prettyR)
> > Mode(freq)
> [1] "1"
>
> You have a single modal value (1). If there were at most two ones, you
> would have three values (2,4,8) that could be considered multiple
> modes. What you seem to be doing is considering values that are not
> separated by commas as modes. Perhaps this is a formatting problem
>
> Jim
>
> On Mon, Mar 16, 2020 at 7:55 AM Yuan Chun Ding <ycding using coh.org> wrote:
> >
> > Hi R users,
> >
> > I want to find multiple modes (10, 8, 149) for the following vector.
> >
> > freq =1,2,5,5  10,4,4,8,1,1,8,8,2,4,3,1,2,1,1 138 149  14,1,1;
> >
> > any suggestion?
> >
> > Thank you,
> >
> > Ding
> >
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