News Feed
Jobs Feed
Sections




News Archive
Looking for more information on how to do PHP the right way? Check out PHP: The Right Way

Ian Barber's Blog:
Benford's Law
April 05, 2011 @ 09:12:46

In a recent post to his blog Ian Barber looks at applying Benford's Law in PHP to determine if the dataset you're working with is "real" or not.

Benfords Law is not an exciting new John Nettles based detective show, but an interesting observation about the distribution of the first digit in sets of numbers originating from various processes. It says, roughly, that in a big collection of data you should expect to see a number starting with 1 about 30% of the time, but starting with 9 only about 5% of the time.

He pulls data from the data.uk.gov site to illustrate and includes a simple PHP script to run through the data looking scoring it with a "Benford" rating. He plots these on a graph along side the data to show the (almost exact) match between the data and the Benford numbers. You can find more details on the law on Wikipedia.

0 comments voice your opinion now!
benfordslaw real fake data evaluate


blog comments powered by Disqus

Similar Posts

AnyExample.com: 5 useful PHP functions for MySQL data fetching

Padraic Brady's Blog: Google roll out OAuth Authorisation to all Google Data APIs

Russell Walker: Handling Global Data in PHP Web Applications

Web & PHP Magazine: Issue #12 - Don't Get in a PECL

Harry Fuecks' Blog: Using OpenSSL, RSA and RC4 to exchange encrypted data from PHP to Java


Community Events











Don't see your event here?
Let us know!


podcast component facebook performance hhvm unittest introduction opinion hack package framework release composer database install security symfony2 language support application

All content copyright, 2014 PHPDeveloper.org :: info@phpdeveloper.org - Powered by the Solar PHP Framework