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grep searching interval

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# 1  
Old 03-10-2011
grep searching interval
Hi all,
I just want to find all values that are in a specified interval. I tryed it with
Code:
grep e-[18-17] file

, it does not work.

Is it possible to get values wich are lower a special number, like
Code:
grep >e-18 file

?

Thanks a lot
# 2  
Old 03-10-2011
Post the input file and the desired output.
# 3  
Old 03-10-2011
input
Code:
0.4604        7.088    5.351e-10
0.536        8.395    1.612e-12
-0.5311       -8.208     3.72e-12
0.7112        8.725    3.685e-17
0.4604        7.088    5.351e-18
0.536        8.395    1.612e-19
-0.5311       -8.208     3.72e-17
0.7112        8.725    3.685e-13

Code:
grep e-[18-17] test.txt

output
Code:
0.4604        7.088    5.351e-10
0.536        8.395    1.612e-12
-0.5311       -8.208     3.72e-12
0.7112        8.725    3.685e-17
0.4604        7.088    5.351e-18
0.536        8.395    1.612e-19
-0.5311       -8.208     3.72e-17
0.7112        8.725    3.685e-13

# 4  
Old 03-10-2011
Do you need to grep the records containing e-17 and e-18?

Code:
grep e-1[78] test.txt

# 5  
Old 03-10-2011
it works, thanks!
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