Question : doing math in a bash script.

I'm grepping a file and getting a list of about a thousand numbers that I need to average and total.. The numbers are not big. The numbers I'm trying to add and average will be between 0 and 10000. What's the best way to average and add these numbers in a bash script? I know I can send the list to a new file and read though it and do the math but I was hoping there might be a way to avoid creating a temp file. Any ideas?

Answer : doing math in a bash script.

Something like this may help:

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#!/bin/bash

SUM=0
ELEMENTS=0
AVG=0

cat myFile | while read line; do
if [ -n "$line" ]; then
let ELEMENTS++;
let SUM=$SUM + $line # let SUM+=$line?? not sure
fi
done

let AVG=$SUM/$ELEMENTS
echo $AVG

Question : doing math in a bash script.

Answer : doing math in a bash script.

Something like this may help: 1: 2: 3: 4: 5: 6: 7: 8: 9: 10: 11: 12: 13: 14: 15: #!/bin/bash SUM=0 ELEMENTS=0 AVG=0 cat myFile | while read line; do if [ -n "$line" ]; then let ELEMENTS++; let SUM=$SUM + $line # let SUM+=$line?? not sure fi done let AVG=$SUM/$ELEMENTS echo $AVG

Something like this may help:

1: 2: 3: 4: 5: 6: 7: 8: 9: 10: 11: 12: 13: 14: 15:

#!/bin/bash SUM=0 ELEMENTS=0 AVG=0 cat myFile | while read line; do if [ -n "$line" ]; then let ELEMENTS++; let SUM=$SUM + $line # let SUM+=$line?? not sure fi done let AVG=$SUM/$ELEMENTS echo $AVG