Display the standard deviation of a column of numbers with awk

awk '{delta=$1; avg+=$1/NR;} END {print "stdev = " sqrt(((delta-avg)^2)/NR);}'
I was concerned that the other scripts didn't use the correct order of operations for the calculation. Variance needs to be squared before being summed, then divided by NR and then square rooted. Not sure if this method is correct but this is what I came up with. I think it works correctly but I'm not totally sure. If anyone could critique it that would be great.

By: 123nor
2016-04-19 08:49:49

2 Alternatives + Submit Alt

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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