UNIX for Dummies Questions & Answers

Hello together!

I have a list like this

Code:

1 3
2 5
3 7
4 2

Now I want to take the average of the second column and multiply it by the difference of the first and last value of the first column.
I posted an similar thread, but now I wonder how I can tell awk in an easy way to take specific values (In this case the first and the last of the first column)

The awk script should do this mathematical :

Code:

 print ( (3+5+7+2)* (4 - 1) )

Thanks a lot!

Björn

formula in example does not show average calculation, but try:

Code:

awk 'NR==1 {a=$1} {b+=$2; c=$1} END {print (b/NR) * (c - a)}' input

Thank you rdrtx1!
That is was what im searchin for.
You were right I lost the denominator.
The (c - a) term is a significance.