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Perl calculate average and standard deviation from specified column of a text file

P: 2
Hi all,

I'm a newbie to perl, really need some help. It seemed to be a very simple question but I kept getting wrong answers... Thanks in advance!!

The text file looks like this:
0.000004 56 78
0.000005 67 89
0.000006 78 23
0.000007 12 56

I need to calculate the average and standard deviation for the 2nd and 3rd column . Thank you so much!!

I appreciate any suggestions :)
Mar 29 '10 #1
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2 Replies

P: 2
hmm.. just to clarify. 0.000004 is column 1, 56 is column 2 and 78 is column 3. Thanks!!!!
Mar 29 '10 #2

P: 70
Use the "avg" and "stddev" functions in the CPAN Acme::Tools module:
Mar 30 '10 #3

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