Center filters

[Robb Reed]

Hi there all:

Anyone care to present a short course on center filters? I haven't found much a bout them in the archives and know even less than I've found.

Specifically, what are they, relative to other filters. They seem rather expens ive in the Excel Chart I downloaded from the site the other day?

Thanks in advance for sharing

RR

[QT Luong]

Please read the filter article on the main page, and come back with questions not answered by the article.