12-12-2007
Hi Zelp,
These are numbers. And basically in a while loop, I do not declare awk. Most of the time, I only do echo which in the end I could not use printf.
Sample code:-
#!/bin/bash
cat a.txt|while read LINE
do
char=`echo "${LINE}"| awk '{print $2}'`
#echo $char
i=`grep -n "^$char" b.txt|awk '{print $2}'`
j=`grep -n "^$char" b.txt|awk '{print $3}'`
k=`grep -n $char$ c.txt|awk '{print $1}'`
echo $i
echo $j
echo $k
q=`echo (($j)/($i+$j))|bc `
echo $q
#awk '{
#q=$j/($i+$j)}
#END{
#printf("q is %d", $q);
#}'
done
I have error in echo where it doesnt allow me to perform computation. I am thinking to use AWK whihc is put easier but I could not because it invovles multiple files to read and compare.
Please advise what is the best solution for this. Thanks!
-Jason
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ECHO(1) BSD General Commands Manual ECHO(1)
NAME
echo -- write arguments to the standard output
SYNOPSIS
echo [-n] [string ...]
DESCRIPTION
The echo utility writes any specified operands, separated by single blank (' ') characters and followed by a newline ('
') character, to the
standard output.
The following option is available:
-n Do not print the trailing newline character.
The end-of-options marker -- is not recognized and written literally.
The newline may also be suppressed by appending 'c' to the end of the string, as is done by iBCS2 compatible systems. Note that the -n
option as well as the effect of 'c' are implementation-defined in IEEE Std 1003.1-2001 (``POSIX.1'') as amended by Cor. 1-2002. For porta-
bility, echo should only be used if the first argument does not start with a hyphen ('-') and does not contain any backslashes (''). If
this is not sufficient, printf(1) should be used.
Most shells provide a builtin echo command which tends to differ from this utility in the treatment of options and backslashes. Consult the
builtin(1) manual page.
EXIT STATUS
The echo utility exits 0 on success, and >0 if an error occurs.
SEE ALSO
builtin(1), csh(1), printf(1), sh(1)
STANDARDS
The echo utility conforms to IEEE Std 1003.1-2001 (``POSIX.1'') as amended by Cor. 1-2002.
BSD
November 12, 2010 BSD