Printing into two files under difference situation Post: 302861393

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Top Forums UNIX for Dummies Questions & Answers Printing into two files under difference situation Post 302861393 by Smiling Dragon on Tuesday 8th of October 2013 08:59:43 PM

10-08-2013

Registered User

Quote:

Originally Posted by grace_shen

Thank you so much!But is it perl or shell script? I am sorry for the easy questions. I usually working on Perl, but it is not like the regular one. How can I run it? Run under the linux command line?

---------- Post updated at 07:55 PM ---------- Previous update was at 07:37 PM ----------

thank you so much for the reply, but I am really a newbie in coding, could u please add some comment on each line so that it is easy for me to refer and adjust. Thank you so much and I really appreciate all the help.

It's unix commandline, but also works in a shell script.
If you make a new file, put:

Code:

#!/bin/sh

As the first line, then the code below in it. You'll be able to run it as a script.
Otherwise, can just copy paste the entire thing into your shell on the commandline at it'll work.

Version with comments:

Code:

#Run the following for every file in the current directory that ends with ".gff" - note that it might
# get confused if you have gff files with a space in the filename.
for file in *.gff
do
  # Find the filename prefix by removing the ".gff" part of the filename
  fileprefix=`echo "$file" | sed 's/\.gff$//'`
  # Go through the .gff file line by line
  cat ${file} | while read line
  do
    # by default, assume we want to include all lines in the "yes" file
    include="yes"
    # For each word on the given line, see if it's present in "name.txt"
    for entry in $line
    do
      # If it is not present, then we know we need to put this line in the "no" file instead
      grep "$entry" name.txt > /dev/null || include=""
    done
    # If we get to the end and $include still has something in it ("yes") then we know we found all the entries on this line
    # So we add it to the "yes" file, otherwise the "no" file
    if [ -n "$include" ]
    then
      echo "${line}" >> "${fileprefix}_yes.gff"
    else
      echo "${line}" >> "${fileprefix}_no.gff"
    fi
  done
  # move onto the next line in the current .gff file
done
# move onto the next gff file

I suspect that perl would be able to do this a little more effiicently by loading the name.txt file into memory, allowing faster checks. But I usually only reach for perl if shell can't do it within a reasonable amount of time/effort.

Smiling Dragon

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LEARN ABOUT OSF1

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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