unique
If I understand your problem correctly (as Milan has pointed out, sample data and code would help enormously) this should get you where you want: unique( shopdata$name[ shopdata$employee > 10 ] ) If not, something is wrong from the outset (or with my understanding, but then ... see above)! Rgds, Rainer
On Tuesday 16 October 2012 14:45:37 paladini wrote:
Hello everybody, I've got a problem concerning the function unique. I have got a data.frame "shopdata" with 1000 shop which were evaluated at different points in time. With function subset I chose those shops with more then 10 employee and store it in data.frame "bigshopdata" with 700 shops. bigshopdata=subset(shopdata, shopdata$employee>10) Now I use unique(bigshopdata$name) to ensure that each shop name is only listed ones and not two or three times because of an evaluation at different dates. What happens is that unique eliminates also those shops names which appear only ones in bigshopdata but twice or more often in shopdata. But that is not what I want to. I'm only interessted in multiple appearance in bigshopdata not in an possible multible appearance in the original data.farme. How can I use unique to get what I want? Or is there an alternative function? I hope I explained the problem good enought. Best regards Claudia
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