How to get the most frequent value of the subgroup

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What you are looking for is commonly called the mode, but
(surprisingly?) there doesn't seem to be a standard implementation for
mode() in R. (the mode function gives you something else entirely) --
this SO thread may be of help:
http://stackoverflow.com/questions/2547402/standard-library-function-in-r-for-finding-the-mode

Michael
Dear Members of the R-Help,

While using a R function - 'aggregate' that you developed, I become to have a question.

In that function,

aggregate(x, by, FUN, ..., simplify = TRUE)

I was wondering about what type of FUN I should write if I want to get "the most frequent value of the subgroup" as a summary statistics of the subgroups.

I will appreciate if I can get your idea on this issue.

Many thanks,

Jason Jung.

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Dear Members of the R-Help,

While using a R function - 'aggregate' that you developed, I become  
to have a question.

In that function,

aggregate(x, by, FUN, ..., simplify = TRUE)
I was wondering about what type of FUN I should write if I want to  
get "the most frequent value of the subgroup" as a summary  
statistics of the subgroups.
Something along the lines of

  function(x){  tbl <- table(x);  retrun(names(tbl)[which.max(tbl)] }

You could also search for definitions that have appeared over the  
years in rhelp for a mode function (but not the existing mode function  
which is not designed to deliver what you request.)
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David Winsemius, MD
West Hartford, CT