[jira] [Commented] (HAMA-894) Implement K-core algorithm

["Edward J. Yoon (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HAMA-894?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14519092#comment-14519092 ] 

Edward J. Yoon commented on HAMA-894:
-------------------------------------

I found one minor bug in KCoreVertex. To write integer type core, writeDouble() method was used. I'm fixing directly.

{code}
Index: src/main/java/org/apache/hama/ml/kcore/KCoreVertex.java
===================================================================
--- src/main/java/org/apache/hama/ml/kcore/KCoreVertex.java	(revision 1676688)
+++ src/main/java/org/apache/hama/ml/kcore/KCoreVertex.java	(working copy)
@@ -101,8 +101,7 @@
   }
 
   @Override
-  public void readFields(DataInput in) throws IOException {
-    super.readFields(in);
+  public void readState(DataInput in) throws IOException {
     core = in.readInt();
     changed = in.readBoolean();
 
@@ -118,9 +117,8 @@
   }
 
   @Override
-  public void write(DataOutput out) throws IOException {
-    super.write(out);
-    out.writeDouble(core);
+  public void writeState(DataOutput out) throws IOException {
+    out.writeInt(core);
     out.writeBoolean(changed);
 
     if (this.estimates == null) {

{code}

> Implement K-core algorithm
> --------------------------
>
>                 Key: HAMA-894
>                 URL: https://issues.apache.org/jira/browse/HAMA-894
>             Project: Hama
>          Issue Type: New Feature
>          Components: graph, machine learning
>            Reporter: Edward J. Yoon
>            Assignee: Jaegwon Seo
>              Labels: gsoc2014
>             Fix For: 0.7.0
>
>         Attachments: kcore.patch
>
>
> Implement the k-core algorithm (using Hama Graph API), which can be used for analyzing large scale complex networks.
> - http://en.wikipedia.org/wiki/K-core#k-Cores



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