R help - Sep 2011 - Removing a single element from an array

R 2.13.1
OS X

Colleagues

I frequently encounter a situation in which I want to remove a single element of
an array.  For example, if I am reading in a bunch of CSV files, I create the
list of files to be read with:
	LIST	<- dir()
However, sometimes I want to exclude one or more files.  I can accomplish this
with a second command:
	LIST	<- LIST[LIST != "filename.to.be.excluded"]
This is cumbersome -- is there some more efficient code to accomplish this?

Dennis


Dennis Fisher MD
P < (The "P Less Than" Company)
Phone: 1-866-PLessThan (1-866-753-7784)
Fax: 1-866-PLessThan (1-866-753-7784)
www.PLessThan.com


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On Sep 18, 2011, at 10:47 AM, Dennis Fisher wrote:
> R 2.13.1
> OS X
>
> Colleagues
>
> I frequently encounter a situation in which I want to remove a  
> single element of an array.  For example, if I am reading in a bunch  
> of CSV files, I create the list of files to be read with:
> 	LIST	<- dir()
> However, sometimes I want to exclude one or more files.  I can  
> accomplish this with a second command:
> 	LIST	<- LIST[LIST != "filename.to.be.excluded"]
> This is cumbersome -- is there some more efficient code to  
> accomplish this?
Doesn't negative indexing provide this?

?Extract

-- 

David Winsemius, MD
West Hartford, CT