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splitting a string based on the last underscore

5 messages · jim holtman, Dimitri Liakhovitski

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Hello!
Hope you could help me split the strings.

I have a set of strings:

x<-c("name_a1_2.5.o","name_a2_2.53.o","name_a3_bla_1.o")

I need to extract from each string:

1. Its unique part that comes before the last "_", i.e.: "a1","a2","a3_bla".
2. The part that comes after the last "_" and before ".o" at the end,
i.e.: 2.5, 2.53, 1.

Thank you so much for your help!
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try this:
[[1]]
[1] "a1"  "2.5"

[[2]]
[1] "a2"   "2.53"

[[3]]
[1] "bla" "1"
On Fri, Jul 29, 2011 at 12:08 PM, Dimitri Liakhovitski
<dimitri.liakhovitski at gmail.com> wrote:

  
    
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Thank you, Jim.
It's close but not all the way. The desired result is:
Dimitri
On Fri, Jul 29, 2011 at 12:35 PM, jim holtman <jholtman at gmail.com> wrote:

  
    
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But your requirements said "last underscore"; so we now have a change
that really says the first underscore.  So we change the regex to:
[[1]]
[1] "a1"  "2.5"

[[2]]
[1] "a2"   "2.53"

[[3]]
[1] "a3_bla" "1"
On Fri, Jul 29, 2011 at 12:40 PM, Dimitri Liakhovitski
<dimitri.liakhovitski at gmail.com> wrote:

  
    
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Thanks a lot, Jim!
Dimitri
On Fri, Jul 29, 2011 at 12:48 PM, jim holtman <jholtman at gmail.com> wrote: