Thank you so much for your quick reply. Unfortunately, I'm afraid that there is no way of massaging my strings into doubles, because the distance measure would have no sense in terms of doubles. Could you please give me some clue to write the required code in order to solve this difficulty?
Thank you very much again. Regards, jfcg > Date: Fri, 28 Aug 2009 08:49:38 -0700 > From: [email protected] > To: [email protected] > Subject: Re: String clustering and other newbie questions > > Juan Francisco Contreras Gaitan wrote: > > Hello, > > > > I would like to do some clustering by using Hadoop and I found Mahout. I am > > really impressed, but as a newbie I got stuck and I have several questions. > > The idea is to do string clustering: I have properties values expressed as > > strings of some resources, and I would like to aggregate these resources. I > > use Eclipse as IDE, and I have two Mahout working projects, one with > > release version (0.1) and the other one with SVN version. I am able to > > compile examples and to run them on my own Hadoop cluster. I have focused > > on Synthetic Control Data example using Canopy algorithm because of its > > similarity to my problem. > > > > - on release version with default parameter values I get all the items on > > the same cluster (C1), is it normal? > > > Are you running the Synthetic Control example data here? That example - > I just ran it on trunk - should produce 6 clusters in one file. It is > binary encoded though, and difficult to interpret in textual > representation. If you search for the string 'SparseVector' in the > canopies/part-0000 file you should see six instances. > > - on SVN version I don't have a readable output because there is no > > implemented OutputDriver. If I use the same as release version, I got > > exceptions (I think that format has changed between releases, for example > > using '{' symbol instead of '[') > > > The output formats of all the clustering routines are now sequence files > which are binary encoded. The old OutputDriver won't handle it. > > - I use string values instead of double values. I have implemented my own > > string distance that returns a double when parameters are string, but I > > think that Mahout Vectors are implemented just to store double values. Is > > there any chance to use string values? > > > Vectors are double only and you will need to massage your data into > numeric format to use out of the box clustering. Is there a way to > convert your property values into doubles? > > I would be very grateful if anyone could help me. > > > I'm going to be working on converting clustering to Hadoop 0.20 in the > next weeks. Let's continue our dialog. > > Thank you very much in advance. > > > > Regards, > > jfcg > > > > _________________________________________________________________ > > ¿Quieres los nuevos emoticonos en 3D? ¡Descárgatelos gratis! > > http://www.vivelive.com/emoticonos3d/index2.html > > > _________________________________________________________________ Internet Explorer 8 más sencillo y seguro ¡Descárgatelo gratis! http://events.es.msn.com/noticias/internet-explorer-8/
