R: Append column with count for a specific value -

i'm looking easy way subset df , append column frequency count. suppose have df this:

name   ja jn ja jb ja jn 

and want have outcome this:

 name    frequency      ja      3     jn      2     jb      1 

any suggestion? thank you.

we can use tally after grouping 'name' dplyr

library(dplyr) df1 %>%    group_by(name) %>%   tally() 

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or use table base r

as.data.frame(table(df1[,1])) #   var1 freq #1   ja    3 #2   jb    1 #3   jn    2