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2010 Jul 19
3
Indexing by logical vectors
Dear R-Listers,
My question concerns indexing vectors by logical vectors that are based
on the original vector. Consider the following simple example to
hopefully make clear what I mean:
a <- rnorm(10)
a[a<0] <- NA
However, I am now working with multiple data frames that I received,
where each of them has nicely descriptive, yet long names(). In my
scripts there are many instances