[R] Extracting Parts of Array (Index Comparison?)

[David Winsemius]

On Aug 18, 2011, at 6:48 PM, teriri wrote:

> I now know that those numbers to the left can be extracted using  
> rowNames().
>
> So how can I extract elements of B where rowNames = rowNames(A)?

B[ rownames(B) %in% rownames(A), ]

(Normally I don't  answer Nabble Q's without context, but this one is  
almost self-contained.)
-- 

David Winsemius, MD
West Hartford, CT