# [R] Frequency table

R. Michael Weylandt michael.weylandt at gmail.com
Thu Nov 24 04:54:14 CET 2011

```I think something like this is what you are looking for, but to be
honest, I don't quite understand what you are looking for: can you
actually write out the desired result:

tapply(df\$x, df\$Var, table)

where df is the name of your data.

df <- structure(list(Var = c(201L, 201L, 201L, 201L, 202L, 202L, 202L,
202L, 203L, 203L, 203L, 203L), rep = c(1L, 2L, 3L, 4L, 1L, 2L,
3L, 4L, 1L, 2L, 3L, 3L), x = c(1L, 3L, 3L, 3L, 1L, 1L, 3L, 5L,
2L, 2L, 3L, 3L)), .Names = c("Var", "rep", "x"), class = "data.frame",
row.names = c(NA,
-12L))

Michael

On Wed, Nov 23, 2011 at 4:07 PM, reynaldo_ns <reynaldo_ns at hotmail.com> wrote:
> Hello everybody
>
> I am new on R
> I have some problem when i try to obtain frequency table
> which script do I need to write in R in order to obtain the frecuency of a
> value per repetition
> You could see my example
>
> Var.           rep           x              I need to obtain these
> 201            1               1            201 the x=1 (repeat once), x=3
> (repeat 3 times)
> 201            2               3            202 the X=1 (repeat 2 twice),
> the x=3 (repeat once),
> 201            3               3            203 the X=2 (rep 3 veces), valor
> 3 (rep 2veces)
> 201            4               3
> 202            1               1             How can I do on R?
> 202            2               1
> 202            3               3
> 202            4               5
> 203            1               2
> 203            2               2
> 203            3               3
> 203            3               3
>
>
> --
> View this message in context: http://r.789695.n4.nabble.com/Frequency-table-tp4101612p4101612.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help