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formatting output using echo

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# 1  
Old 01-09-2009
formatting output using echo
i have the following script:

Code:
while [ $j -lt $outer ];do

b=${ARRAY2[j]}
i=0
while [ $i -lt $count ];do
a=${ARRAY1[k]}
fin[i]=`echo $a - $b | bc`
echo -e  "${fin[i]}," >> try
((i++))
((k++))
done
echo -n >> try
#add statement to format output here
#printf "\t" >> try
#echo -e '\t' >> nik
((j++))
echo $j
done

the file i get is this:
Code:
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
 
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
 
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,

i would like to get:
Code:
0,0,0
0,0,0
0,0,0
0,0,0
0,0,0
0,0,0
0,0,0
0,0,0
0,0,0
0,0,0
0,0,0
0,0,0
0,0,0

i tried playing with echo (commented out) but was not able to get the next set of zeroes to start on a new column..is there an easy way to do this without modifying the above script too much? whatever statement that is going to be added is shown by the comment.
thanks
# 2  
Old 01-09-2009
Quote:
Originally Posted by npatwardhan
i have the following script:

That is only a snippet of a script; it cannot be run as is.

Many variables are not initialized.
Quote:
Code:
while [ $j -lt $outer ];do


Neither $j nor $outer is initialized.
Quote:
Code:
b=${ARRAY2[j]}
i=0
while [ $i -lt $count ];do


$count is not initialized.
Quote:
Code:
a=${ARRAY1[k]}
fin[i]=`echo $a - $b | bc`


What are the values of $a and $b? Are they integers? If so, you don't need to call an external command.
Quote:
Code:
echo -e  "${fin[i]}," >> try


Is this what you want:

Code:
printf "%s," "${fin[i]}," >> try

Quote:
Code:
((i++))
((k++))


It's better to use the standard format for arithmetic:

Code:
i=$(( $i + 1 ))
k=$(( $k + 1 ))

Quote:
Code:
done
echo -n >> try
#add statement to format output here
#printf "\t" >> try
#echo -e '\t' >> nik
((j++))


See above.
# 3  
Old 01-11-2009
ok thanks for your help..
sorry for the confusion but i would just like to write my data into different columns instead of rows.
is there any way you can change the offset in the file so that it is on the next column instead of row? this way i can keep appending to the file with a new column.
# 4  
Old 01-11-2009
Quote:
Originally Posted by npatwardhan
ok thanks for your help..
sorry for the confusion but i would just like to write my data into different columns instead of rows.
is there any way you can change the offset in the file so that it is on the next column instead of row? this way i can keep appending to the file with a new column.

The file is written sequentially; you cannot insert new columns without rebuilding the entire file.

You could write to multiple files and paste them together:

Code:
for n in 1 2 3
do
  x=1
  while [ $x -le 4 ]
  do
    echo $n$x
    x=$(( $x + 1 ))
  done > "file$n"
done
paste file1 file2 file3 > file

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