From: Thaden, John J <ThadenJohnJ_at_uams.edu>

Date: Thu, 10 Jul 2008 07:41:07 -0500

R-help_at_r-project.org mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Received on Thu 10 Jul 2008 - 13:37:44 GMT

Date: Thu, 10 Jul 2008 07:41:07 -0500

This shouldn't be hard, but it's just not
coming to me:

Given a vector, e.g.,

v <- c(20, 134, 45, 20, 24, 500, 20, 20, 20)
how can I get the index of the last value in
the vector having a value greater than n, in
this case, greater than 20? I'm looking for
an efficient function I can use on very large
matrices, as the FUN argument in the apply()
command.

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R-help_at_r-project.org mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Received on Thu 10 Jul 2008 - 13:37:44 GMT

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