awk average same column in multiple files(with certain range)

问题

As I said, I got answer from here: AWK multiple files averge

However, that is not enough if I have multiple files dummy_0.txt dummy_100.txt dummy_200.txt... dummy_5000.txt ... dummy_50000.txt. I only want to average column 2 of files range from dummy_0.txt to dummy_5000.txt.

Instead of doing this:

awk '{a[FNR]+=$2;b[FNR]++;}END{for(i=1;i<=FNR;i++)print i,a[i]/b[i];}' dummy_*.txt

I need something like where interval is 100

awk '{a[FNR]+=$2;b[FNR]++;}END{for(i=1;i<=FNR;i++)print i,a[i]/b[i];}' dummy_[100 - 5000].txt

How can I do it?

回答1:

You can use glob range {start..end..interval} in bash:

awk '{a[FNR]+=$2; b[FNR]++}
   END{for(i=1;i<=FNR;i++) print i,a[i]/b[i]}' dummy_{100..5000..100].txt

来源：https://stackoverflow.com/questions/35599505/awk-average-same-column-in-multiple-fileswith-certain-range