I have a sample text file with file name: sample.txt
The text file has the following text.
Code:
this is an example text where we have to extract certain words before and after certain word these words can be used later to get more information
I want to extract n (a constant) words before and after a certain word. For example, I want to extract 2 words before and after the word "words" in the sample text above. The output that I expect is:
Code:
extract certain words before and
word these words can be
This is what I have attempted:
Code:
grep -owP '.{0,2}words.{0,2}' sample.txt
and the output that I get is this:
Code:
[white-space] word [white-space]
[white-space] word [white-space]
,where [white-space] represents " ". Now when I increase the window size from 2 to 10 in the code above like this:
Code:
grep -owP '.{0,10}words.{0,10}' sample.txt
I get the following output:
Code:
[white-space]certain words before[white-space]
[white-space]these words can be[white-space]
Therefore, one can see that the above code is considering characters before and after and not words. I am using BASH.
Last edited by Don Cragun; 11-02-2015 at 04:07 PM..
Reason: Change ICODE tags to CODE tags.
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11-02-2015
