See agrep function:

agrep("Frozen Niagara Entrance", "001a Frozen Niagara Entrance") > 0

To remove the numbers:

gsub("\\d", "", "001a Frozen Niagara Entrance")



On Mon, Oct 18, 2010 at 12:58 PM, <Kurt_Helf@nps.gov> wrote:

> Greetings
>     I want to remove numbers  from a string of characters that identify
> sites so that I can merge two data frames.  For example, a site in one
> frame is called  "001a Frozen Niagara Entrance" whereas the same site in
> the other data frame is called "Frozen Niagara Entrance".  It seems to me
> the easiest thing to do would be to remove the numbers from the first data
> frame so the two will match.  How do I go about removing those numbers?
> Thanks in advance.
> Cheers
> Kurt
>
> ***************************************************************
> Kurt Lewis Helf, Ph.D.
> Ecologist
> EEO Counselor
> National Park Service
> Cumberland Piedmont Network
> P.O. Box 8
> Mammoth Cave, KY 42259
> Ph: 270-758-2163
> Lab: 270-758-2151
> Fax: 270-758-2609
> ****************************************************************
> Science, in constantly seeking real explanations, reveals the true majesty
> of our world in all its complexity.
> -Richard Dawkins
>
> The scientific tradition is distinguished from the pre-scientific tradition
> in having two layers.  Like the latter it passes on its theories but it
> also passes on a critical attitude towards them.  The theories are passed
> on not as dogmas but rather with the challenge to discuss them and improve
> upon them.
> -Karl Popper
>
> ...consider yourself a guest in the home of other creatures as significant
> as yourself.
> -Wayside at Wilderness Threshold in McKittrick Canyon, Guadalupe Mountains
> National Park, TX
>
> Cumberland Piedmont Network (CUPN) Homepage:
> http://tiny.cc/e7cdx
>
> CUPN Forest Pest Monitoring Website:
> http://bit.ly/9rhUZQ
>
> CUPN Cave Cricket Monitoring Website:
> http://tiny.cc/ntcql
>
> CUPN Cave Aquatic Biota Monitoring Website:
> http://tiny.cc/n2z1o
>
> ______________________________________________
> R-help@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.
>



-- 
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O

	[[alternative HTML version deleted]]

