[R] How to count rows with a condition

[arun]

HI, 
I tried the code with unsorted ac_names column and found to be 
working.  So, couldn't identify exactly the problem.  If you can provide
 a subset of your dataset using ?dput(), then it would be much helpful. 

set.seed(1) 
dat1<-data.frame(ac_name=sample(c("HouseA","HouseB","HouseC","HouseD","HouseE","HouseF","HouseG","HouseI","HouseJ"),50,replace=TRUE),val=rnorm(50,15)) 
dat2<-within(dat1,{ac_name<-as.character(ac_name)}) 
dat2<-dat2[order(dat2[,1]),] 
 dat3<-dat2[dat2[,1]%in%count(dat2[,1])$x[count(dat2[,1])[2]>5],] #data excluded 
dat4<-dat2[!dat2[,1]%in%count(dat2[,1])$x[count(dat2[,1])[2]>5],] #data included 
A.K. 


----- Original Message -----
From: fxen3k <f.sehardt at gmail.com>
To: r-help at r-project.org
Cc: 
Sent: Wednesday, October 17, 2012 9:57 AM
Subject: Re: [R] How to count rows with a condition

Thanks for the first reply. 

Unfortunately, my list of different ac_names ist pretty long (about 1,000
different names). Is there a way, to sort them, count the quantity of each
name and exclude these rows, who exceed a particular limit?



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