[R] How to drop variables using a wildcard and logic...

[Sundar Dorai-Raj]

Alternatively, you can use ?glob2rx

test[, grep(glob2rx("*[tT]"), names(test))]

which allows for wildcards.

--sundar

Benilton Carvalho said the following on 3/26/2007 12:19 PM:
> if 'test' is your data frame...
> 
> test[, grep("[tT]$", names(test))]
> 
> b
> 
> On Mar 26, 2007, at 3:06 PM, mtb954 at gmail.com wrote:
> 
>> Dear R users
>>
>> I would like to make a new dataframe  from an existing dataframe,  
>> retaining
>> ONLY those variables that end in the letter "t"
>>
>> I have searched the help archives and consulted several reference  
>> books but
>> cannot seem to find an example.
>>
>> Any ideas...? Thanks!
>>
>> Mark
>>
>> 	[[alternative HTML version deleted]]
>>
>> ______________________________________________
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>> guide.html
>> and provide commented, minimal, self-contained, reproducible code.
> 
> ______________________________________________
> R-help at stat.math.ethz.ch 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.