[R] unique/subset problem

From: lalitha viswanath <lalithaviswanath_at_yahoo.com>
Date: Thu 25 Jan 2007 - 17:53:58 GMT


Hi
I am new to R programming and am using subset to extract part of a data as follows

names(dataset) =
c("genome1","genome2","dist","score");
prunedrelatives <- subset(dataset, score < -5);

However when I use unique to find the number of unique genomes now present in prunedrelatives I get results identical to calling unique(dataset$genome1) although subset has eliminated many genomes and records.

I would greatly appreciate your input about using "unique" correctly in this regard.

Thanks
Lalitha  



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