[R] Factor Variable frequency

[ruipbarradas at sapo.pt]

Hello,

Maybe the following (untested).

table(df$Protocol[df$Speed == "SLOW"])

Hope this helps,

Rui Barradas
 

Citando ch.elahe via R-help <r-help at r-project.org>:

> Hi all,
> I have the following df:
>
>    $ Protocol       : Factor w/ 48 levels "DP FS QTSE SAG",..: 2 3  
> 43 42 31 36 37 30 28 5 ...
>
>    $ Speed         : chr  "SLOW" "SLOW" "SLOW" "VerySLOW" ...
> How can I get the most frequent Protocol when Speed is "SLOW"?
> Thanks for any help!
> Elahe
>
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