using grep for numbers

mkrems · 01-30-2008, 02:31 PM

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

thanks

reddazz · 01-30-2008, 03:20 PM

Hi and welcome to LQ.

How about using awk e.g.

Code:

grep "t =" name_of_file.dat | awk '{ print $3 }'

Does that help?

mkrems · 01-30-2008, 04:03 PM

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