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Full Discussion: sed with special characters
Top Forums Shell Programming and Scripting sed with special characters Post 302304557 by sandholm on Monday 6th of April 2009 07:44:08 PM
Old 04-06-2009
What you have looks fine, just replace the bc line with this:

X=`echo "scale=1;$X / 60/ 60" | bc` # Convert seconds to hours, with 1 decimal.

The "scale" variable defines your precision. It's documented in the "bc" man page. :-)

I've added my version of your program above:

#! /bin/bash

cat data | sed 's/,//g' |
while read a b c
do
x=$(echo "scale=1;$a/60/60" | bc)
echo "$x hrs, $b $c"
done

And this was done without the need of calling awk; of course I called "sed" and "bc". but I think you get the idea.

Last edited by sandholm; 04-06-2009 at 09:47 PM.. Reason: further example
 

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echo(1B)					     SunOS/BSD Compatibility Package Commands						  echo(1B)

NAME
echo - echo arguments to standard output SYNOPSIS
/usr/ucb/echo [-n] [argument] DESCRIPTION
echo writes its arguments, separated by BLANKs and terminated by a NEWLINE, to the standard output. echo is useful for producing diagnostics in command files and for sending known data into a pipe, and for displaying the contents of envi- ronment variables. For example, you can use echo to determine how many subdirectories below the root directory (/) is your current directory, as follows: o echo your current-working-directory's full pathname o pipe the output through tr to translate the path's embedded slash-characters into space-characters o pipe that output through wc -w for a count of the names in your path. example% /usr/bin/echo "echo $PWD | tr '/' ' ' | wc -w" See tr(1) and wc(1) for their functionality. The shells csh(1), ksh(1), and sh(1), each have an echo built-in command, which, by default, will have precedence, and will be invoked if the user calls echo without a full pathname. /usr/ucb/echo and csh's echo() have an -n option, but do not understand back-slashed escape characters. sh's echo(), ksh's echo(), and /usr/bin/echo, on the other hand, understand the black-slashed escape characters, and ksh's echo() also understands a as the audible bell character; however, these commands do not have an -n option. OPTIONS
-n Do not add the NEWLINE to the output. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWscpu | +-----------------------------+-----------------------------+ SEE ALSO
csh(1), echo(1), ksh(1), sh(1), tr(1), wc(1), attributes(5) NOTES
The -n option is a transition aid for BSD applications, and may not be supported in future releases. SunOS 5.11 3 Aug 1994 echo(1B)
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