Regular expression query in AWK Post: 302075632

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Regular expression query in AWK

I have a varable(var1) in a AWK script that contain data in the following format - I need to extract timestamp,priority and log message.I can extract these by using split function but i don't want to use it, since i want to extract it in one go. I have some difficulties in doing it using...

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awk and regular expression

Ive got a file with words and also numbers. Bla BLA 10 10 11 29 12 89 13 35 And i need to change "10,29,89,25" and also remove anything that contains actually words...

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regular expression and awk

I can print a line with an expression using this: awk '/regex/' I can print the line immediately before an expression using this: awk '/regex/{print x};{x=$0}' How do I print the line immediately before and then the line with the expression?

4. Shell Programming and Scripting

need help guys for Regular expression in awk

Hello Experts, Please help me to cope with the following problem I ve patterens like Input Noptx(5) // remain the same -*Nop(3); Nop(9); --Nop(8); // remain the same d3 **---Nop(7); //remain the same d3 **---Nop(7); *--Nop(6); --**Nop(5); -Nop(4); Nop(3); - represents a space...

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Awk's variable in regular expression

Anyone know how I will use awk's variable in a regular expression? This line of code of mine is working, the value PREMS should be a variable: awk '$1 ~ /PREMS/ { if(length(appldata)+2 >= length($1)) print $0; }' appldata=$APPLDATA /tmp/file.tmp The value of APPLDATA variable is PREMS. ...

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Query Regarding Regular Expression

Can you please tell me the meaning of .* For eg. i have a text as "Scrapple the apple" Now here, what does a.*e will match?

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Regular expression in AWK

Hello world, I was wondering if there is a nicer way to write the following code (in AWK): awk ' FNR==NR&&$1~/^m$/{tok1=1} FNR==NR&&$1~/^m10$/{tok1=1} ' my_file In fact, it looks for m2, m4, m6, m8 and m10 and then return a positive flag. The problem is how to define 10 thanks...

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Perl: How to read from a file, do regular expression and then replace the found regular expression

Hi all, How am I read a file, find the match regular expression and overwrite to the same files. open DESTINATION_FILE, "<tmptravl.dat" or die "tmptravl.dat"; open NEW_DESTINATION_FILE, ">new_tmptravl.dat" or die "new_tmptravl.dat"; while (<DESTINATION_FILE>) { # print...

9. Shell Programming and Scripting

awk regular expression

Hello, I have big files which I wanna filter them based on first column. first column should be one of these strings: chr2L || chr2R || chr3L || chr3R || chr4 || chrX and something like chr2Lh or chrY or chrM3L is not accepted. I used the following command: awk '{ if ($1=="chr2L" ||...

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awk regular expression search

Hi All, I would like to search a regular expression by passing as an i/p variableto AWK. For Example :: 162.111.101.209.9516 162.111.101.209.41891 162.111.101.209.9516 162.111.101.209.9517 162.111.101.209.41918 162.111.101.209.9517 162.111.101.209.41937 162.111.101.209.41951...

LEARN ABOUT ULTRIX

ppmtopgm

ppmtopgm(1)						      General Commands Manual						       ppmtopgm(1)

NAME

       ppmtopgm - convert a portable pixmap into a portable graymap

SYNOPSIS

       ppmtopgm [ppmfile]

DESCRIPTION

       Reads  a  portable  pixmap  as  input.  Produces a portable graymap as output.  The output is a "black and white" rendering of the original
       image, as in a black and white photograph.  The quantization formula used is .299 r + .587 g + .114 b.

       Note that although there is a pgmtoppm program, it is not necessary for simple conversions from pgm to ppm , because any  ppm  program  can
       read  pgm  (and	pbm  ) files automatically.  pgmtoppm is for colorizing a pgm file.  Also, see ppmtorgb3 for a different way of converting
       color to gray.  And ppmdist generates a grayscale image from a color image, but in a way that makes it easy to differentiate  the  original
       colors, not necessarily a way that looks like a black and white photograph.

QUOTE

       Cold-hearted orb that rules the night
       Removes the colors from our sight
       Red is gray, and yellow white
       But we decide which is right
       And which is a quantization error.

SEE ALSO

       pgmtoppm(1),ppmtorgb3(1),rgb3toppm(1),ppmdist(1),ppm(5),pgm(5)

AUTHOR

       Copyright (C) 1989 by Jef Poskanzer.

								   10 April 2000						       ppmtopgm(1)

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