Averaging across multiple columns

Question

[Agamemnon]

Hi,

I would like to average values from column 3 to 24. The data structure is as follows:

#FID IID SCORE10.AVG SCORE11.AVG SCORE12.AVG SCORE13.AVG SCORE14.AVG SCORE15.AVG SCORE16.AVG SCORE17.AVG SCORE18.AVG SCORE19.AVG SCORE1.AVG SCORE20.AVG SCORE21.AVG SCORE22.AVG SCORE2.AVG SCORE3.AVG SCORE4.AVG SCORE5.AVG SCORE6.AVG SCORE7.AVG SCORE8.AVG SCORE9.AVG
4206209 2159878 7.81977e-05 6.47787e-05 -0.0021166 -0.000111422 7.81977e-05 -0.00194971 0.000976662 -0.00178663 -0.0029736 -0.00166744 -0.000402559 -0.00210566 -0.00130077 0.00122846 -0.00296566 -0.000676401 0.000319205 -0.0012993 -0.000231331 -0.00251666 -0.00246146 -0.00089255 -0.00162087
2619089 5849169 -3.36376e-07 0.000166214 -0.00229081 0.000175182 -3.36376e-07 -0.00144829 0.000844795 -0.00178175 -0.00392416 -0.00169813 -0.000339629 -0.00241469 -0.00124691 0.00117414 -0.00293646 -0.00043481 0.000182961 -0.00155656 -0.000366005 -0.00274512 -0.00220684 -0.000876328 -0.00163762
4963755 4126600 4.80562e-05 -8.03571e-06 -0.00205945 2.89793e-05 4.80562e-05 -0.00180237 0.000952638 -0.00180321 -0.00410665 -0.001539 -0.00034781 -0.00228668 -0.0012383 0.0011158 -0.00306278 -0.000557173 0.000221675 -0.00140883 -0.000314032 -0.00245025 -0.00225357 -0.000983217 -0.00144304
5292894 2300468 4.70042e-05 0.000112097 -0.00187693 1.57412e-05 4.70042e-05 -0.00186633 0.000984547 -0.00170159 -0.00414575 -0.00170298 -3.9728e-05 -0.00229207 -0.00150641 0.00120988 -0.00315069 -0.000646717 0.000189562 -0.0012411 -0.000346555 -0.00258908 -0.00250897 -0.000868924 -0.00160577
...

The aim is to get something like:

#FID IID Summed_Mean
4206209 2159878 [(sum 3-24)/22]
2619089 5849169 [(sum 3-24)/22]
4963755 4126600 [(sum 3-24)/22]
5292894 2300468 [(sum 3-24)/22]

I know awk would be the appropriate tool, but I am not sure, how to tackle it, and can't find anything on the forum that could be adapted.

[cpad0112]

Seems there is an extra column at the end i.e 25 columns and 25th column without header.

Answer 1

[Agamemnon]

Got the answer from a different forum:

awk '
NR==1 {
  print $1,$2,"Average"
  next
}
{
  sum=0
  for(i=3;i<=24;i++){
    sum+=$i
  }
  print $1,$2,sum/22
}
' merged.sscore

Answer 2

[Pierre Lindenbaum]

awk '{T=0.0;N=0;for(i=3;i<=24;i++) {T+=$i;N++;} printf("%s\t%s\n",$0,T/N);}'

[cpad0112]

This prints entire data and average at the end.

$ awk -v FS="\t" '{T=0.0;N=0;for(i=3;i<=24;i++) {T+=$i;N++;} printf("%s\t%s\t%s\n", $1,$2,T/N);}' will print OP required output.

[Agamemnon]

I understand now, this adds the last column with the summed average.