files and arrays

[cwl157]

How do i store each line of a file into a variable. I know how to read in each line and then print how many lines their are. So now how to i make that instead of just print the number of lines take each line and store it in a variable? Then i want to break up what is stored in each variable because each variable will store 2 columns of numbers and store one column in one array and the other column in another array.

a=0
while read line
do a=$(($a+1));
echo $a;
done < "myfile"
echo "Final line count is: $a";

[drl]

Hi.

You have already done so in your code snippet; see http://www.tldp.org/LDP/Bash-Beginne...ect_08_02.html and bookmark, look at the index, etc., to answer other similar questions ... cheers, drl

[cwl157]

Ok, I'm an idiot. line is the variable. So now i figured out how to get the values in the arrays. Now i have to find the avg of the values in the array. How do i call an array. I keep getting a syntax error teletype. Is it $arrayName[$index]? I don't think that works. Or is it just arrayName[$index]? I tried that too. basically i have a sum variable and then i have to add sum to arrayName[$index] and then store it back in sum. Then i take that divide by the size of the array to get the average but i keep getting the teletype error. Here is the part of the code to find the average. Anyone know why i am getting this error?

index=1
  #find x average
  while [ "$index" -lt "$sizeX" ]
  do
    tempX=$xValues[$index]
    xSum=$(echo "scale=5 ; $xSum + $tempX" | bc)
    (( index++ ))
  done
  xAvg=$(echo "scale=5 ; $xSum / $sizeX" | bc)
  echo "the x average is " $xAvg

  index=1
  #find y average
  while [ "$index" -lt "$sizeY" ]
  do
    ySum=$(echo "scale=5 ; ($ySum + $yValues[$index])" | bc)
    (( index++ ))
  done
  yAvg=$(echo "scale=5 ; ($ySum / $sizeY)" | bc)
  echo "the y average is " $yAvg

[likwid]

${array_name[element]}

Is how to reference an array's element. The size of the array is ${#array_name[*]}

You're referencing your arrays all wrong, and you've got some other small errors in there.

[cwl157]

o yea, my fault. I'll go back and change how i reference the arrays. What other small errors are there?

[likwid]

NM I read it quick and thought I saw a couple, but I neglected to notice for instance the pipe to bc in that one variable assignment. Give it a go once you fix your array references, I think it will work.