[R] splitting a string based on the last underscore

[Dimitri Liakhovitski]

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!

-- 
Dimitri Liakhovitski
marketfusionanalytics.com