Talk:Ban (information)

From Wikipedia, the free encyclopedia

[edit] Request for references

Request for references: I suppose some of it is still classified, but nonetheless, are there any references for this article, particularly pertaining to Turing's and Good's work? I added a couple of references to the article, but they only pertain to the material I added about Hartley. 130.94.162.64 22:52, 25 November 2005 (UTC)

The material is now in the Ban (information ) page. This page can be deleted.

[edit] Graphical Tables

So, who wants to convert these tables into regular ones? I'm about to go to bed, but I will mark this page and do it tomorrow if nobody else has by then. --Grey Knight ⊖ 00:05, 20 November 2006 (UTC)

[edit] Citation needed

There was a [citation needed] tag in the sentence "decibans corresponds to an odds ratio of 10:1; 20 decibans to 100:1 odds, etc". That is relatively straightforward math (see bellow) so I presume it refers to the use of it as in "The deciban is a particularly useful measure of information in odds-ratios or weights of evidence" and moved it there.

Given a event with odds 1:n, then the information is I = -log\left(\frac{1}{n+1}\right)-log\left(\frac{n}{n+1}\right).

For n "large", I \approx -log\left(\frac{1}{n}\right)-log\left(\frac{n}{n}\right) = log(n)

So, for n=10^k\,,k=1,2,.., then I \approx log(10^k) = k\;[ban]. - Nabla (talk) 16:35, 22 April 2008 (UTC)