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Top Forums Shell Programming and Scripting data format from (4.56 0.7) -> 4.6(7) awk?! Post 302072235 by ahan on Saturday 29th of April 2006 06:48:06 PM
Old 04-29-2006
data format from (4.56 0.7) -> 4.6(7) awk?!

Hi,
I have to manipulate a data file which say reads like this
{$index $value $error_on_value}

aa 4.56 0.7
bb 123.456 0.00987
cc 987654 321
.
.
in easily human readable format of type

aa 4.6(7)
bb 123.456(1)
cc 9.877(3)e+05

value rounded to 4.6 with error of 0.7 on the last significant digit.
In 2nd row, error is rounded off
in 3rd, exponential form suits better for this. but this is optional. (In awk, its printf with "%g" option )


I tried to play with awk, where I formatted first with say
'{printf "%d\t1.3e\t%1.0e\n",$1,$2,$3}'
then can manipulate to get it dirty way to the type mentioned in row 3.

I am sure there is smart way to do this. If I get any suggestion, it would greatly improve my experience, so thanks in advance.

ps: My actual data file has (2n+1) number of columns. 1st being index, then even ones are value and odd ones are error on that. Should there be smart way to ask script to sense "n" (say using awk NF), and automate that, that would be cool.
 

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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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