string manipulating

psalas · #1 (**permalink**) 04-15-2008

I have a file like this:

Code:

Tue Apr 15 10:41:47 MDT 2008 FINAL RESULT; 6
Tue Apr 15 10:41:47 MDT 2008 FINAL RESULT; 2
Tue Apr 15 10:41:47 MDT 2008 FINAL RESULT; 5

With this command seira=`cut -f 2 -d ';' tes.txt` i take all the results (6,2,5 etc) and i store them in variable seira

When i do echo $seira it prints: 6 2 5

With this command i want to take the sum of the results from seira where they are stored 6+2+5 etc

Code:

while read seira
	do
	echo $seira
		sum=0
		sum='expr $sum + $seira'
		echo $sum
	done

But it doesn't work. What is wrong?

radoulov · #2 (**permalink**) 04-15-2008

You could use something like this:

Code:

sum=$(($(cut -d\; -f2 file|paste -sd+ -)))

psalas · #3 (**permalink**) 04-15-2008

Thank you but this is my last option. I would like an option with while an d the read command to learn better manipulate strings.Thats why. Can you or anybody else suggest anything else? Withe while read?

radoulov · #4 (**permalink**) 04-15-2008

Code:

$ while read;do num=$((num+${REPLY##*;}));done<file;printf "%d\n" $num
13

With zsh:

Code:

% while read;do ((num+=${REPLY##*;}));done<file;print $num
13

psalas · #5 (**permalink**) 04-15-2008

something is not working could someone fix the problem with this solution:
while read seira
do
sum=0
sum='expr $sum + $seira'
echo $sum
done

radoulov · #6 (**permalink**) 04-15-2008

...

Code:

cut -d\; -f2 file|while read seira
do
  sum=`expr ${sum-0} + $seira`
  echo $sum
done

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