tag:blogger.com,1999:blog-29117034.post7079166708663960291..comments2024-01-08T12:39:20.176+01:00Comments on Data Mining Research - dataminingblog.com: Cluster validity: Existing indicesSandro Saittahttp://www.blogger.com/profile/17682082649770875583noreply@blogger.comBlogger9125tag:blogger.com,1999:blog-29117034.post-46197704106505285002009-01-21T14:31:00.000+01:002009-01-21T14:31:00.000+01:00Hello,I'm not sure, but I think you can find a Mat...Hello,<BR/><BR/>I'm not sure, but I think you can find a Matlab version of this code on Mathworks. You should look for codes using "clustering", "cluster index", "cluster indices" as search terms. <BR/><BR/>Hope it helps.Sandro Saittahttps://www.blogger.com/profile/17682082649770875583noreply@blogger.comtag:blogger.com,1999:blog-29117034.post-62109440106340447132009-01-20T19:53:00.000+01:002009-01-20T19:53:00.000+01:00hi there, does anyone know the SDbw index proposed...hi there, does anyone know the SDbw index proposed by Halkidi et al.? I've implemented the SDbw index, but my implementation of the index does not minimise with the optimal number of clusters. Any code or a link to source code of this index will be appreciated. Thx.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-29117034.post-68219847118692210842006-12-25T13:00:00.000+01:002006-12-25T13:00:00.000+01:00hi, merry christmas! thank you for your advice. i'...hi, merry christmas! thank you for your advice. i'm trying,....i'll let you know as soon as i have the result.jackiehttps://www.blogger.com/profile/15092645200515053209noreply@blogger.comtag:blogger.com,1999:blog-29117034.post-41491397790362124432006-12-21T12:43:00.000+01:002006-12-21T12:43:00.000+01:00Sorry, I cannot find any information on "overall m...Sorry, I cannot find any information on "overall mean inner cluster similarity". I have look in the book you mentioned, but was not able to find anything. I have also look on Google and the search about "overall mean inner cluster similarity" is only giving two hits (on of them is this blog). So it is quite low for a validity index. I think it should have a different name in the literature.<br /><br />My advise is to use another validity index such as Silhouette or Davies-Bouldin. Dunn index is not computationaly efficient. There are many other validity indices existing. I think Silhouette is a good first try. A paper for a very short introduction (in order to implement it) can be this one: "Cluster Validation Techniques for Genome Expression Data". You can find it using Google.Sandro Saittahttps://www.blogger.com/profile/17682082649770875583noreply@blogger.comtag:blogger.com,1999:blog-29117034.post-75253834739045628662006-12-21T10:19:00.000+01:002006-12-21T10:19:00.000+01:00thank you for help. i just want to know how to com...thank you for help. i just want to know how to compute the index of "the overall mean inner cluster similarity" and "the overall mean inter cluster similarity". by the way, i'm doing some work on clustering the web logs right now, do you know any validity index except the recommendation accuracy because i don't want to do recommendation right now. thanks again!jackiehttps://www.blogger.com/profile/15092645200515053209noreply@blogger.comtag:blogger.com,1999:blog-29117034.post-68517106922920956842006-12-21T09:44:00.000+01:002006-12-21T09:44:00.000+01:00The book you mention is from Kaufman and Rousseeuw...The book you mention is from Kaufman and Rousseeuw. They have developed the Silhouette width. I don't know if this is the validity index you're talking about. I will see if I can get the book to have a look inside it.Sandro Saittahttps://www.blogger.com/profile/17682082649770875583noreply@blogger.comtag:blogger.com,1999:blog-29117034.post-54570570591659228682006-12-21T09:21:00.000+01:002006-12-21T09:21:00.000+01:00oh, yes, i know it's from the book: Finding groups...oh, yes, i know it's from the book: Finding groups in data. an introduction to cluster analysis, but i can't find the source. so i would appreciate it if you can help me. it's urgent, thanks!jackiehttps://www.blogger.com/profile/15092645200515053209noreply@blogger.comtag:blogger.com,1999:blog-29117034.post-7177759344199462122006-12-15T22:38:00.000+01:002006-12-15T22:38:00.000+01:00Hi Jackie,
I would be glad to help you if you giv...Hi Jackie,<br /><br />I would be glad to help you if you give me some more details about the validity index you're talking about.<br />Do you have an author name, a date?Sandro Saittahttps://www.blogger.com/profile/17682082649770875583noreply@blogger.comtag:blogger.com,1999:blog-29117034.post-23123932102006392212006-12-14T10:00:00.000+01:002006-12-14T10:00:00.000+01:00hello, i heard that there is an indice of clusteri...hello, i heard that there is an indice of clustering validity, called the overall mean inner cluster similarity and the overall mean inter cluster similarity, but i don't know how to compute it. do you know that? can you tell me?jackiehttps://www.blogger.com/profile/15092645200515053209noreply@blogger.com