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Full Discussion: Extract variables from filenames and output to file
Top Forums Shell Programming and Scripting Extract variables from filenames and output to file Post 302513542 by malandisa on Wednesday 13th of April 2011 02:06:08 PM
Old 04-13-2011
Hi kevintse,

Thank you for that explanation and the time you have taken to help. Much appreciated. I am still figuring out how I will add another column there. One way I am thinking is if it is possible to put the 'filename' directly into this line command so that the command does not read the 'filename' from the file called data.

I thought something like this would work...
Quote:
perl -pe 's/^.(\d{4})(\d{3}).*$/$1 $2/' 'e20012110129_xform_azisum_mlt_2.25_0.50.txt'
so that the output is
Quote:
2001 211
then I can add another variable as a third column

Any advice will be appreciated
Thank you
 

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LEARN ABOUT OPENSOLARIS

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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