[R] inverse of which()

Jeff Newmiller jdnewm|| @end|ng |rom dcn@d@v|@@c@@u@
Thu Feb 28 00:17:34 CET 2019

use grepl?

On February 27, 2019 3:03:27 PM PST, Ed Siefker <ebs15242 using gmail.com> wrote:
>Given a vector of booleans, chich() will return indices that are TRUE.
>Given a vector of indices, how can I get a vector of booleans?
>My intent is to do logical operations on the output of grep().  Maybe
>there's a better way to do this?
>R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
>PLEASE do read the posting guide
>and provide commented, minimal, self-contained, reproducible code.

Sent from my phone. Please excuse my brevity.

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