more than one source of data to process with bc

Question

I have this file that contains number in a column:

[root@server1]# cat numbers.txt
30
25
15

I need to add them together so I do this:

[root@autonoc cattests]# cat numbers.txt |  paste -s -d+ | bc
70

But after I add them together I need to divide them by 60,something like this:

[root@server1]# cat numbers.txt |  paste -s -d+ | "new command" | bc

how can I do that?

Answer 1

Using awk:

$ awk '{s+=$1} END{print s/60}' numbers.txt
1.16667

How it works

• s+=$1

  The number on each lien of numbers.txt is added to variable s.

• END{print s/60}

  After we have finished reading the file, we print the value of s divided by 60.

Answer 2

bc -l <<< '('$(paste -s -d+ numbers.txt)')/60'

Answer 3

awk -v div=60 '{tot+=$0}END{print tot/div}' numbers.txt

Using the -v div=60 can be extended further to accept any user input, like

read -p "Enter the div value: " div
awk -v div="$div" ...

IHTH

Answer 4

You can use dc

dc -f numbers.txt -e '++3k60/[result = ]np'