Awk Notes: Difference between revisions
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== standard deviation with awk == | |||
<pre> | |||
awk '{for(i=1;i<=NF;i++) {sum[i] += $i; sumsq[i] += ($i)^2}} | |||
END {for (i=1;i<=NF;i++) { | |||
printf "%f %f \n", sum[i]/NR, sqrt((sumsq[i]-sum[i]^2/NR)/NR)} | |||
}' file.dat >> aver-std.dat | |||
</pre> | |||
where file.dat is one column of numbers. | |||
[[Category:Computers]] | [[Category:Computers]] | ||
Latest revision as of 15:40, 2 November 2022
I love you awk
standard deviation with awk
awk '{for(i=1;i<=NF;i++) {sum[i] += $i; sumsq[i] += ($i)^2}}
END {for (i=1;i<=NF;i++) {
printf "%f %f \n", sum[i]/NR, sqrt((sumsq[i]-sum[i]^2/NR)/NR)}
}' file.dat >> aver-std.dat
where file.dat is one column of numbers.
