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Operating Systems Linux how to grep special character regular expression? Post 302355731 by sogi on Wednesday 23rd of September 2009 02:18:41 PM
Old 09-23-2009
how to grep special character regular expression?

Hi Smilie

I have 2 files

file1:

Code:
SNP_A-2208459   
SNP_A-4215188   
SNP_A-2012248   
SNP_A-1882998


file2:

Code:
CHR  SNP  UNADJ       BONF         HOLM     *   *    *  etc.
  19   SNP_A-2236481  1.742e-26  5.442e-21    
  13   SNP_A-4204405  8.643e-07  1.505e-06   
   3    SNP_A-1860908  4.483e-06  7.279e-06
   7    SNP_A-1990194  7.434e-06  1.181e-05
   *
   *
   *
   etc. (thousands of rows)

Note: file2 also contains the entries listed in file1

Question: I'm using grep -w -f file1 file2 > file3 to match in file2 only the entries listed in file1, BUT this does not work Smilie ; the output file3 is giving me everything listed in file2 Smilie.

Can anyone help? pleaaaaaaaaaaaaase

Thank you!

Last edited by vgersh99; 09-23-2009 at 06:49 PM.. Reason: code tags, PLEASE!
 

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diff3(1)						      General Commands Manual							  diff3(1)

NAME
diff3 - 3-way differential file comparison SYNOPSIS
file1 file2 file3 DESCRIPTION
compares three versions of a file, and prints disagreeing ranges of text flagged with these codes: all three files differ file1 is different file2 is different file3 is different The type of change required to convert a given range of a given file to some other is indicated in one of these ways: Text is to be appended after line number n1 in file f, where f = or Text is to be changed in the range line n1 through line n2. If n1 = n2, the range can be abbreviated to n1. The original contents of the range follows immediately after a indication. When the contents of two files are identical, the contents of the lower-numbered file is suppressed. Produces a script for the editor that can be used to incorporate into file1 all changes between file2 and file3 (see ed(1)); i.e., the changes that normally would be flagged and Produces a script to incorporate only changes flagged Produces a script to incorporate only changes flagged Produces a script that will incorporate all changes between file2 and file3, but treat overlapping changes (that is, changes that would be flagged with in normal listing) differently. The overlapping lines in both files will be inserted by the edit script bracketed by and lines. Produces a script that will incorporate only changes flagged , but treat these changes in the manner of option. The following command applies the resulting script to file1. EXTERNAL INFLUENCES
International Code Set Support Single- and multi-byte character code sets are supported. WARNINGS
Text lines that consist of a single period defeat Files longer than 64K bytes do not work. FILES
SEE ALSO
diff(1). diff3(1)
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