PERL Standard Deviation lib

PiyaPerl has asked for the wisdom of the Perl Monks concerning the following question:

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Re: PERL Standard Deviation lib by hippo (Archbishop) on Sep 07, 2016 at 09:37 UTC
I see the Statistics::Basic lib available but how to implement the same using arrays and not list. You can think of an array as a named list. What did you try? `my $std_dev = Statistics::Basic::stddev (@act_ret);` [download] looks like it should work, according to the documentation. Does it not?	[reply] [d/l]
Re: PERL Standard Deviation lib by BrowserUk (Patriarch) on Sep 07, 2016 at 09:10 UTC
Take a look at Statistics::Basic; but be aware that you pick up a lot of stuff you don't need to get the simple bits you want. With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday' Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error. "Science is about questioning the status quo. Questioning authority". I knew I was on the right track :) In the absence of evidence, opinion is indistinguishable from prejudice.	[reply]
Re: PERL Standard Deviation lib by Corion (Patriarch) on Sep 07, 2016 at 08:23 UTC
Have you looked at the formula for calculating the mean and standard deviation? They are not that hard to implement yourself.	[reply]
Re^2: PERL Standard Deviation lib by PiyaPerl (Acolyte) on Sep 07, 2016 at 08:30 UTC
Like creating a subroutine and doing the calculation for the same...???? wont the lib be a better way of doing it.	[reply]
Re: PERL Standard Deviation lib by karlgoethebier (Abbot) on Sep 08, 2016 at 09:03 UTC
I use Statistics::Descriptive: `#!/usr/bin/env perl use strict; use warnings; use Data::Dump; use Statistics::Descriptive; my $stat = Statistics::Descriptive::Full->new(); my @act_ret = ( 1, 2, 3, 4 ); $stat->add_data(@act_ret); dd $stat->standard_deviation(); __END__ karls-mac-mini:monks karl$ ./deviation.pl 1.29099444873581` [download] Seems to work ;-) See also Regards, Karl ŤThe Crux of the Biscuit is the Apostropheť	[reply] [d/l]