Originally Posted by RavinderSingh13

Thank you Rudi, just adding to his comments in case you need each time sets like from 1 to 40, 41 to 80 and so on then you could nullify the values of variables named x and y as follows, whenever there is line completely divided by 40.

Code:

awk '{x+=$2;y+=$2^2;} NR%40==0{print sqrt(y/NR-(x/NR)^2);x=y=""}' Input_file

Again as I haven't seen sample Input_file so this is based on the previous threads communications and provided information only, hope this helps.


Thanks,
R. Singh