commons-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Phil Steitz <>
Subject Re: [Jakarta Commons Wiki] Updated: MathWishList
Date Mon, 27 Sep 2004 02:43:10 GMT wrote:

> * "Rolling" statistics with large windows but limited storage
> []
* I don't understand; we already have some storage-less
> statistics.  What am I missing from the post you refer to? -- AlChou
The article referenced in the post (E. J. Wegman and D.J. Marchette, "On
Some Techniques for Streaming Data:  A Case Study of Internet Packet
Headers" Journal of Computational and Graphical Statistics,  vol. 12, no.
4, Dec. 2003) presents smoothing techniques that allow you to achieve a
similar effect to what our "rolling" statistics provide (which store and
manage the full window's worth of data) without storing the data in the

It also presents a method for recursively updating kernel density
estimates, btw, which could improve the klunky, multi-pass algorithm 
currently used by EmpiricalDistributionImpl.


To unsubscribe, e-mail:
For additional commands, e-mail:

View raw message