count ties after rank?

Hello!

   I need to use Kruskal-Wallis test and post-hoc test (Dunn's test)  
for my data. But when I searched around,

"Searching around" is a bit vague as a search strategy:

Try :kruskal dunn" at the location that RSiteSearch gets you to:

http://search.r-project.org/cgi-bin/namazu.cgi?query=kruskal+Dunn&max=100&result=normal&sort=score&idxname=functions&idxname=Rhelp08&idxname=Rhelp10&idxname=Rhelp02

Or in its default settings:

http://search.r-project.org/cgi-bin/namazu.cgi?query=kruskal+Dunn&max=100&result=normal&sort=score&idxname=functions&idxname=vignettes&idxname=views

I only found this function: kruskal.test. But nothing for Dunn's test.

   So I started to write one myself.

You are perhaps referring to what others are callng the  Nemenyi- 
Damico-Wolfe-Dunn test. See the last example in the entry that ? 
kruskal_test would have gotten you... had you known where it was.

install.packages("coin")
require(coin)
help("LocationTests")

 But  I do not know how to count ties in the data frame. I can use  
for loops but it seems long and unnecessary since the rank function  
actually knows the ties. So can anyone give me a hint on how I can  
"count" the number of ties?

   Many thanks.

David Winsemius, MD
West Hartford, CT