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Full Discussion: Using perl to grep a list of patterns from an input file
Top Forums Shell Programming and Scripting Using perl to grep a list of patterns from an input file Post 302761527 by gimley on Friday 25th of January 2013 11:22:50 PM
Old 01-26-2013
The pattern file will have around 300 patterns. It is the Input file i.e. the file which has to be grepped which is the worrisome part. It will have around 300,000 unique records. The grep from pattern gave really goofed up results and this is why I posted the request.
Many thanks for your interest

---------- Post updated at 11:22 PM ---------- Previous update was at 08:29 PM ----------

I tested the data on the large file and it worked perfectly, all the more so since the data is in UTF-8 format.
How can I modify the code if I want it to give me only two to three samples from the input file.
I am new to AWK and I tried to change the
Code:
N++

operator but could not make it work for a numeric value.
Many thanks again for your kind help
 

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LEARN ABOUT PLAN9

ppmpat

ppmpat(1)						      General Commands Manual							 ppmpat(1)

NAME

       ppmpat - make a pretty pixmap

SYNOPSIS

       ppmpat -gingham2|-g2|-gingham3| -g3|-madras|-tartan| -poles|-squig|-camo| -anticamo width height

DESCRIPTION

       Produces a portable pixmap of the specified width and height, with a pattern in it.

       This  program  is mainly to demonstrate use of the ppmdraw routines, a simple but powerful drawing library.  See the ppmdraw.h include file
       for more info on using these routines.  Still, some of the patterns can be rather pretty.  If you have a color workstation, something  like
       ppmpat -squig 300 300 | ppmquant 128 should generate a nice background.

OPTIONS

       The different flags specify various different pattern types:

       -gingham2
	      A gingham check pattern.	Can be tiled.

       -gingham3
	      A slightly more complicated gingham.  Can be tiled.

       -madras
	      A madras plaid.  Can be tiled.

       -tartan
	      A tartan plaid.  Can be tiled.

       -poles Color gradients centered on randomly-placed poles.  May need to be run through ppmquant.

       -squig Squiggley tubular pattern.  Can be tiled.  May need to be run through ppmquant.

       -camo  Camouflage pattern.  May need to be run through ppmquant.

       -anticamo
	      Anti-camouflage pattern - like -camo, but ultra-bright colors.  May need to be run through ppmquant.

       All flags can be abbreviated to their shortest unique prefix.

REFERENCES

       Some of the patterns are from "Designer's Guide to Color 3" by Jeanne Allen.

SEE ALSO

       pnmtile(1), ppmquant(1), ppm(5)

AUTHOR

       Copyright (C) 1989 by Jef Poskanzer.

								 04 September 1989							 ppmpat(1)
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