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Full Discussion: awk to log transform on matrix file
Top Forums Shell Programming and Scripting awk to log transform on matrix file Post 302773825 by Yoda on Thursday 28th of February 2013 06:15:31 PM
Old 02-28-2013
Not sure If I understood your requirement, is this what you are trying to do?
Code:
awk ' NR == 1 {
                print
} NR > 1 {
                for (i=1; i<=NF; i++)
                {
                        if($i ~ /^[0-9]+$/)
                        {
                                $i = log($i) / log(2)
                                printf "%.2f ", $i
                        }
                        else
                                printf "%s ", $i
                }
                printf "\n"
} ' file

 

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LEARN ABOUT CENTOS

igawk

IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME

       igawk - gawk with include files

SYNOPSIS

       igawk [ all gawk options ] -f program-file [ -- ] file ...
       igawk [ all gawk options ] [ -- ] program-text file ...

DESCRIPTION

       Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1).

       AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like

	      @include getopt.awk

       in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path.

OPTIONS

       See gawk(1) for a full description of the AWK language and the options that gawk supports.

EXAMPLES

       cat << EOF > test.awk
       @include getopt.awk

       BEGIN {
	    while (getopt(ARGC, ARGV, "am:q") != -1)
		 ...
       }
       EOF

       igawk -f test.awk

SEE ALSO

       gawk(1)

       Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995.

AUTHOR

       Arnold Robbins (arnold@skeeve.com).

Free Software Foundation					    Nov 3 1999								  IGAWK(1)
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