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Full Discussion: Mean and Standard deviation
Top Forums Shell Programming and Scripting Mean and Standard deviation Post 302310927 by bakunin on Monday 27th of April 2009 10:56:59 AM
Old 04-27-2009
Maybe the problem is in the regexp:

Quote:
Originally Posted by lakshmikanth.pg
grep -e '^a' file | grep -v 'aa'|grep -v 'ai'|grep -v 'au' > test.file
You obviously want to match "a", but not "aa" or "ai", etc., right? As your file has spaces delimiting the first field use these to limit your matched lines to only the wanted ones:

Code:
grep '^a ' file | ...

Notice the space character behind the "a" - this will match only the lines starting with "a" but not these starting with "a<something>".

I hope this helps.

bakunin
 

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LEARN ABOUT V7

zgrep

ZGREP(1)						      General Commands Manual							  ZGREP(1)

NAME

       zgrep - search possibly compressed files for a regular expression

SYNOPSIS

       zgrep [ grep_options ] [ -e ] pattern filename...

DESCRIPTION

       Zgrep  invokes  grep  on  compressed  or  gzipped  files.   These  grep	options  will  cause  zgrep  to  terminate  with  an  error  code:
       (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*).  All other options specified are passed directly to grep.  If no file is specified,  then  the
       standard input is decompressed if necessary and fed to grep.  Otherwise the given files are uncompressed if necessary and fed to grep.

       If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.

EXIT CODE

       2 - An option that is not supported was specified.

AUTHOR

       Charles Levert (charles@comm.polymtl.ca)

SEE ALSO

       grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)

																	  ZGREP(1)
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