Compute average and standard deviation with awk

Question

I have a \'file.dat\' with 24 (rows) x 16 (columns) data.

I have already tested the following awk script that computes de average of each column.

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Answer 1

Your script should somehow be in this form instead:

awk '{
    sum = 0
    for (i=1; i<=NF; i++) {
        sum += $i
    }
    avg = sum / NF
    avga[NR] = avg
    sum = 0
    for (i=1; i<=NF; i++) {
        sum += ($i - avg) ^ 2
    }
    stda[NR] = sqrt(sum / NF)
}

END { for (i = 1; i in stda; ++i) { printf "%f %f \n", avga[i], stda[i] } }' file.dat >> aver-std.dat