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Old 01-30-2008, 03:31 PM   #1
Registered: Jan 2008
Distribution: Ubuntu
Posts: 31

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using grep for numbers

i need to extract the time from some data files i am working with. at this point i can grab the line "t = 0.125" and other times from the files, but how can i grab just the number, in this case 0.125.

the current expression i am using is:
grep "t =" name_of_file.dat

Old 01-30-2008, 04:20 PM   #2
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Registered: Nov 2003
Location: N. E. England
Distribution: Fedora, CentOS, Debian
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Hi and welcome to LQ.

How about using awk e.g.
grep "t =" name_of_file.dat | awk '{ print $3 }'
Does that help?
Old 01-30-2008, 05:03 PM   #3
Registered: Jan 2008
Distribution: Ubuntu
Posts: 31

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yes, that does the job...thank you so much!


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