diff --git a/src/eva2/tools/math/interpolation/BasicDataSet.java b/src/eva2/tools/math/interpolation/BasicDataSet.java
index 44367080..24cc4609 100644
--- a/src/eva2/tools/math/interpolation/BasicDataSet.java
+++ b/src/eva2/tools/math/interpolation/BasicDataSet.java
@@ -14,66 +14,37 @@
 
 package eva2.tools.math.interpolation;
 
-import eva2.tools.sort.XYDoubleArray;
-
-/*==========================================================================*
- * IMPORTS
- *==========================================================================*/
-
 /**
  * The minimum wrapper class for an <code>AbstractDataSet</code>.
  */
-public class BasicDataSet extends AbstractDataSet
-{
-	/*-------------------------------------------------------------------------*
-	 * protected member variables
-	 *-------------------------------------------------------------------------*/
+public class BasicDataSet extends AbstractDataSet {
 	protected int dataType = -1;
 	protected String xLabel = null;
 	protected String yLabel = null;
 
-	/*------------------------------------------------------------------------*
-	 * constructor
-	 *------------------------------------------------------------------------*/
 	public BasicDataSet()
 	{
 		this(null, null, null, null);
 	}
 
-	public BasicDataSet(XYDoubleArray data)
-	{
-		this(data.x, data.y, null, null);
-	}
-
-	public BasicDataSet(XYDoubleArray data, String xLabel, String yLabel)
-	{
-		this(data.x, data.y, xLabel, yLabel);
-	}
-
 	public BasicDataSet(
-		double[] xDoubleData,
-		double[] yDoubleData,
-		int dataType)
-	{
+			double[] xDoubleData,
+			double[] yDoubleData,
+			int dataType) {
 		this(xDoubleData, yDoubleData, null, null);
 	}
 
 	public BasicDataSet(
-		double[] xDoubleData,
-		double[] yDoubleData,
-		String xLabel,
-		String yLabel)
-	{
+			double[] xDoubleData,
+			double[] yDoubleData,
+			String xLabel,
+			String yLabel) {
 		this.xDoubleData = xDoubleData;
 		this.yDoubleData = yDoubleData;
 		this.xLabel = xLabel;
 		this.yLabel = yLabel;
 	}
 
-	/*-------------------------------------------------------------------------*
-	* public methods
-	*-------------------------------------------------------------------------*/
-
 	public int getDataType()
 	{
 		return dataType;
@@ -94,7 +65,3 @@ public class BasicDataSet extends AbstractDataSet
 		return new String();
 	}
 }
-
-/****************************************************************************
- * END OF FILE
- ****************************************************************************/
\ No newline at end of file
diff --git a/src/eva2/tools/sort/XYDoubleArray.java b/src/eva2/tools/sort/XYDoubleArray.java
deleted file mode 100644
index 9318b154..00000000
--- a/src/eva2/tools/sort/XYDoubleArray.java
+++ /dev/null
@@ -1,112 +0,0 @@
-/**
- *  Filename: $RCSfile: XYDoubleArray.java,v $
- *  Purpose:  A description of the contents of this file.
- *  Language: Java
- *  Compiler: JDK 1.4
- *  Authors:  Joerg K. Wegner
- *  Version:  $Revision: 1.6 $
- *            $Date: 2001/10/17 11:37:42 $
- *            $Author: wegnerj $
- *  Copyright (c) Dept. Computer Architecture, University of Tuebingen, Germany
- */
-
-/*==========================================================================*
- * PACKAGE
- *==========================================================================*/
-
-package eva2.tools.sort;
-
-/*==========================================================================*
- * IMPORTS
- *==========================================================================*/
-
-
-/*==========================================================================*
- * CLASS DECLARATION
- *==========================================================================*/
-
-/**
- * Defines two <code>double[]</code> arrays.
- *
- * @version         $Revision: 1.6 $, $Date: 2001/10/17 11:37:42 $
- *
- */
-public class XYDoubleArray implements Cloneable{
-  /*-------------------------------------------------------------------------*
-   * public member variables
-   *-------------------------------------------------------------------------*/
-  //public static final int TABLE_OUTPUT=JChart2DUtils.TABLE_OUTPUT;
-  //public static final int VECTOR_OUTPUT=JChart2DUtils.VECTOR_OUTPUT;
-  public double[] x=null;
-  public double[] y=null;
-
-  /*-------------------------------------------------------------------------*
-   * constructor
-   *-------------------------------------------------------------------------*/
-  public XYDoubleArray(int length)
-  {
-    this.x=new double[length];
-    this.y=new double[length];
-  }
-
-  public XYDoubleArray(double[] x, double[] y)
-  {
-    this.x=x;
-    this.y=y;
-  }
-
-  /*-------------------------------------------------------------------------*
-   * public methods
-   *-------------------------------------------------------------------------*/
-
-  public final void swap(int a, int b)
-  {
-    double xx = x[a]; x[a] = x[b]; x[b] = xx;
-    double yy = y[a]; y[a] = y[b]; y[b] = yy;
-  }
-
-  /*public final void sortX(){
-    QuickInsertSort quickInsertSort = new QuickInsertSort();
-    quickInsertSort.sortX(this);
-  }
-
-  public final void sortY(){
-    QuickInsertSort quickInsertSort = new QuickInsertSort();
-    quickInsertSort.sortY(this);
-  }*/
-
-  //
-  // uses jchart2d methods !;-(
-  //
-  /*public String toString(){
-    return toString(TABLE_OUTPUT);
-  }
-
-  private String toString(int output){
-    if(x==null || y==null)return null;
-    BasicDataSet data=new BasicDataSet(x, y,
-                                       AbstractDataSet.CONTINUOUS_DATA,
-                                       "x",
-                                       "y");
-    String s=JChart2DUtils.writeDataSetToString(data, output);
-    return s;
-  }*/
-
-  public Object clone()
-  {
-    double[] newX=new double[x.length];
-    double[] newY=new double[y.length];
-    XYDoubleArray newArray=new XYDoubleArray(newX, newY);
-
-    for(int i=0;i<x.length;i++){
-      newArray.x[i]=x[i];
-      newArray.y[i]=y[i];
-    }
-
-    return newArray;
-  }
-}
-
-/****************************************************************************
- * END OF FILE
- ****************************************************************************/
\ No newline at end of file