Mahout custom Clusterdumper only output center point

hadoop1.0.4,mahout0.5.

Mahout inside the implementation of the read clustering algorithm, called Clusterdumper, this class output format is generally as follows:

Vl-2{n=6 c=[1.833, 2.417] r=[0.687, 0.344]}  
    Weight: Point  :  
    1.0: [1.000, 3.000]  
...  
    1.0: [3.000, 2.500]  
vl-11{n=7 c=[2.857, 4.714] r=[0.990, 0.364]}  
    Weight: Point  :  
    1.0: [1.000, 5.000]  
...  
    1.0: [4.000, 4.500]  
vl-14{n=8 c=[4.750, 3.438] r=[0.433, 0.682]}  
    Weight: Point  :  
    1.0: [4.000, 3.000 ]  
    ...  
    1.0: [5.000, 4.000]

However, if I only want to achieve the output of the cluster center file, then not. Originally want to inherit clusterdumper, results Clusterdumper is a final, forget, or write it yourself.

Back to the column page: http://www.bianceng.cnhttp://www.bianceng.cn/Programming/extra/

Refer to the source code in Clusterdumper, as follows:

For (Cluster value:  
           new Path (Seqfiledir, "part-*"), sequencefiledirvalueiterable<cluster> Pathtype.glob, conf)) {  
        String fmtstr = value.asformatstring (dictionary);  
        if (subString > 0 && fmtstr.length () > subString) {  
          writer.write (': ');  
          Writer.write (fmtstr, 0, Math.min (subString, Fmtstr.length ()));  
        else {  
          writer.write (FMTSTR);  
        }

or refer to the LZ before an article: Mahout source Kmeansdriver analysis of the second center point file Analysis (no text), there are also about the cluster center reading;

You can write a Clustercenterdump class, as follows:

Package com.caic.cloud.util;  
Import Java.io.File;  
Import java.io.FileNotFoundException;  
Import java.io.IOException;  
      
Import Java.io.Writer;  
Import Org.apache.commons.logging.Log;  
Import Org.apache.commons.logging.LogFactory;  
Import org.apache.hadoop.conf.Configuration;  
Import Org.apache.hadoop.fs.Path;  
Import Org.apache.mahout.clustering.Cluster;  
Import Org.apache.mahout.common.iterator.sequencefile.PathType;  
      
Import org.apache.mahout.common.iterator.sequencefile.SequenceFileDirValueIterable;  
Import Com.google.common.base.Charsets;  
      
Import Com.google.common.io.Files; /** * Just output the center vector to a given file * @author fansy * * */public class Clustercenterdump {PR  
    Ivate Log Log=logfactory.getlog (clustercenterdump.class);  
    Private Configuration conf;  
    Private Path Centerpathdir;  
          
    Private String OutputPath; /*public clustercenterdump () {} public Clustercenterdump (Configuration conf) { 
        this.conf=conf; }*/public Clustercenterdump (Configuration conf,string centerpathdir,string outputpath) {THIS.C  
        onf=conf;  
        This.centerpathdir=new Path (Centerpathdir);  
    This.setoutputpath (OutputPath); /** * Write the given cluster center to the given file * @return * @throws Filenotfou Ndexception */public Boolean writecentertolocal () throws filenotfoundexception{if (this.conf==null || this.outputpath==null| |  
            This.centerpathdir==null) {log.info ("Error:\nshould initial the configuration, OutputPath and Centerpath");  
        return false;  
        } Writer Writer=null;  
            Try {file Outputfile=new file (OutputPath);  
            writer = Files.newwriter (outputfile, charsets.utf_8); This.writetxtcenter (writer, New Sequencefiledirvalueiterable<cluster> ( NeW Path (Centerpathdir, "part-*"), Pathtype.glob, conf);  
                    New Sequencefiledirvalueiterable<writable> (New Path (Centerpathdir, "part-r-00000"), Pathtype.list,  
                    Pathfilters.partfilter (), Conf));  
        Writer.flush ();  
            catch (IOException e) {log.info ("Write error:\n" +e.getmessage ());  
        return false;  
                }finally{try {if (writer!=null) {writer.close ();  
            The catch (IOException e) {log.info ("Close writer error:\n" +e.getmessage ());  
    } return true; 
     /** * Write the cluster to writer * @param writer * @param cluster * @return * @throws IOException * * Private Boolean Writetxtcenter (Writer writer,iterable<cluster> clusters) t Hrows ioexception{for (cluster cluster:clusters) {String fmtstr = cluster.asformatstring (null);  
            System.out.println ("Fmtstr:" +fmtstr);  
            Writer.write (FMTSTR);  
        Writer.write ("\ n");  
    return true;  
    Public Configuration getconf () {return conf;  
    public void setconf (Configuration conf) {this.conf = conf;  
    Public Path Getcenterpathdir () {return centerpathdir;  
    } public void Setcenterpathdir (Path centerpathdir) {this.centerpathdir = Centerpathdir;  
    }/** * @return the OutputPath */public String Getoutputpath () {return outputpath; /** * @param outputpath the OutputPath to set */public void Setoutputpath (String outputpath)  
    {This.outputpath = OutputPath; }  
      
          
}

Here is a test class: