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Full Discussion: Searching a String
Top Forums Shell Programming and Scripting Searching a String Post 302558827 by grepeverything on Sunday 25th of September 2011 03:10:10 PM
Old 09-25-2011
hi,
I know you've already got a solution but just to say there is another way which gives you pretty much the same output you wanted:
Code:
grep -o '^\<[[:alnum:]]*\>' yourtextfile  | sort | uniq -c | sort -nr

* grep -o '^\<[[:alnum:]]*\>' finds the first alphanumeric word (using \< and \>, see the grep manpage for an explanation) on the line. If you remove the "^" it will give you word frequency for every word in the file.
* the option -o means only print the matched pattern, which is often extremely useful
So you've already now extracted all the first words from your file, you just have to count the frequency of them, which you can do with uniq -c after they're ordered so duplicates are adjacent. The final sort -r (reverse order) puts them in the ordered you wanted.
 

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LEARN ABOUT V7

ppmtosixel

ppmtosixel(1)						      General Commands Manual						     ppmtosixel(1)

NAME

       ppmtosixel - convert a portable pixmap into DEC sixel format

SYNOPSIS

       ppmtosixel [-raw] [-margin] [ppmfile]

DESCRIPTION

       Reads  a  portable  pixmap  as input.  Produces sixel commands (SIX) as output.	The output is formatted for color printing, e.g. for a DEC
       LJ250 color inkjet printer.

       If RGB values from the PPM file do not have maxval=100, the RGB values are rescaled.  A printer control header and a color assignment table
       begin the SIX file.  Image data is written in a compressed format by default.  A printer control footer ends the image file.

OPTIONS

       -raw   If  specified,  each  pixel  will  be explicitly described in the image file.  If -raw is not specified, output will default to com-
	      pressed format in which identical adjacent pixels are replaced by "repeat pixel" commands.  A raw file is often an order	of  magni-
	      tude larger than a compressed file and prints much slower.

       -margin
	      If  -margin  is not specified, the image will be start at the left margin (of the window, paper, or whatever).  If -margin is speci-
	      fied, a 1.5 inch left margin will offset the image.

PRINTING

       Generally, sixel files must reach the printer unfiltered.  Use the lpr -x option or cat filename > /dev/tty0?.

BUGS

       Upon rescaling, truncation of the least significant bits of RGB values may result in poor color conversion.  If the original PPM maxval was
       greater	than  100,  rescaling  also reduces the image depth.  While the actual RGB values from the ppm file are more or less retained, the
       color palette of the LJ250 may not match the colors on your screen.  This seems to be a printer limitation.

SEE ALSO

       ppm(5)

AUTHOR

       Copyright (C) 1991 by Rick Vinci.

								   26 April 1991						     ppmtosixel(1)
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