[R] removing a specific number of digist from a character string

[Jeffrey Robert Spies]

For the sake of absolute correctness:

> sub('[[:digit:]]{4}\.tif', '', test)

should be

sub('[[:digit:]]{4}\\.tif', '', test)

-- Jeff.

On Sep 17, 2007, at 11:59 AM, Jeffrey Robert Spies wrote:

> test <- c("060907_17_3_5_1_1_2909.tif", "060907_17_3_5_2_1_2910.tif",
> "060907_17_3_5_3_1_2911.tif")
> sub('[[:digit:]][[:digit:]][[:digit:]][[:digit:]]\.tif', '', test)
>
> or
>
> test <- c("060907_17_3_5_1_1_2909.tif", "060907_17_3_5_2_1_2910.tif",
> "060907_17_3_5_3_1_2911.tif")
> sub('[[:digit:]]{4}\.tif', '', test)
>
> -- Jeff.
>
> On Sep 17, 2007, at 11:21 AM, Kim Milferstedt wrote:
>
>> Hello,
>>
>> I would like to remove the last 8 digists of character strings in a
>> vector. Below I added a couple of elements from that vector.
>>
>> I have a problem defining a pattern to replace the digits using for
>> example "sub". Removing the ".tif" part works fine using
>> sub('.tif',"",x), but how do I get rid of the four preceding digits?
>>
>> Thanks for your help,
>>
>> Kim
>>
>> Input:
>> [3988]
>> "060907_17_3_5_1_1_2909.tif"   "060907_17_3_5_2_1_2910.tif"
>> "060907_17_3_5_3_1_2911.tif"
>> [3991]
>> "060907_17_3_5_4_1_2912.tif"   "060907_17_3_5_5_1_2913.tif"
>> "060907_17_3_5_6_1_2914.tif"
>>
>> Desired output:
>> [3988] "060907_17_3_5_1_1_"   "060907_17_3_5_2_1_"
>> "060907_17_3_5_3_1_"
>> [3991] "060907_17_3_5_4_1_"   "060907_17_3_5_5_1_"
>> "060907_17_3_5_6_1_"
>>
>> __________________________________________
>>
>> Kim Milferstedt
>> University of Illinois at Urbana-Champaign
>> Department of Civil and Environmental Engineering
>> 4125 Newmark Civil Engineering Laboratory
>> 205 North Mathews Avenue MC-250
>> Urbana, IL 61801
>> USA
>> phone: (001) 217 333-9663
>> fax: (001) 217 333-6968
>> email: milferst at uiuc.edu
>> http://cee.uiuc.edu/research/morgenroth
>>
>> ______________________________________________
>> 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.
>
> ______________________________________________
> 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.