Dear All,
Thank you very much for all your responses. I am sorry. My file is a
little different now. It is like following:
1 data_34.dat pre= -7872.11914060 post= -7812.80517600 diff= 59.31396460
2 data_5.dat pre= -7986.76147466 post= -7926.94091800 diff= 59.82055666
3 data_16.dat pre= -8117.66357420 post= -8057.25097700 diff= 60.41259720
4 data_36.dat pre= -7628.28979490 post= -7564.08691400 diff= 64.20288090
5 data_18.dat pre= -8145.31860358 post= -8078.61328100 diff= 66.70532258
How can I use regular expression to get:
data_34.dat
data_5.dat
data_16.dat
..
Thank you very much. I greatly appreciate it.
