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Message-ID: <3EC42373.3000507@latte.harvard.edu>
Date: Thu, 15 May 2003 19:32:03 -0400
From: "Mark R. Diggory" <mdiggory@latte.harvard.edu>
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To: Jakarta Commons Developers List <commons-dev@jakarta.apache.org>
Subject: Re: [math][patch] New RollingUnivariateImpl
References: <3EC422D7.80307@latte.harvard.edu>
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Ughh, sorry about the copyright that got dumped in there, feel free to 
replace it with the Apaches.

Mark R. Diggory wrote:

> Well the latest changes to the cvs made the implementation of the 
> RollingUnivariate quite simple indeed. Tell me what you think.
>
> -Mark
>
>------------------------------------------------------------------------
>
>Index: .classpath
>===================================================================
>RCS file: .classpath
>diff -N .classpath
>--- /dev/null	1 Jan 1970 00:00:00 -0000
>+++ .classpath	15 May 2003 23:22:10 -0000
>@@ -0,0 +1,6 @@
>+<?xml version="1.0" encoding="UTF-8"?>
>+<classpath>
>+    <classpathentry kind="src" path="src/java"/>
>+    <classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
>+    <classpathentry kind="output" path="target/classes"/>
>+</classpath>
>Index: .project
>===================================================================
>RCS file: .project
>diff -N .project
>--- /dev/null	1 Jan 1970 00:00:00 -0000
>+++ .project	15 May 2003 23:22:10 -0000
>@@ -0,0 +1,17 @@
>+<?xml version="1.0" encoding="UTF-8"?>
>+<projectDescription>
>+	<name>math</name>
>+	<comment></comment>
>+	<projects>
>+	</projects>
>+	<buildSpec>
>+		<buildCommand>
>+			<name>org.eclipse.jdt.core.javabuilder</name>
>+			<arguments>
>+			</arguments>
>+		</buildCommand>
>+	</buildSpec>
>+	<natures>
>+		<nature>org.eclipse.jdt.core.javanature</nature>
>+	</natures>
>+</projectDescription>
>Index: src/java/org/apache/commons/math/RollingUnivariate.java
>===================================================================
>RCS file: src/java/org/apache/commons/math/RollingUnivariate.java
>diff -N src/java/org/apache/commons/math/RollingUnivariate.java
>--- /dev/null	1 Jan 1970 00:00:00 -0000
>+++ src/java/org/apache/commons/math/RollingUnivariate.java	15 May 2003 23:22:10 -0000
>@@ -0,0 +1,43 @@
>+package org.apache.commons.math;
>+import org.apache.commons.math.StoreUnivariate;
>+
>+/*
>+ * Created on May 15, 2003
>+ *
>+ * Copyright (C) 2002-2003, Mark Diggory 
>+ *
>+ * This program is free software; you can redistribute it and/or modify
>+ * it under the terms of the GNU General Public License as published by
>+ * the Free Software Foundation; either version 2 of the License, or
>+ * (at your option) any later version.
>+ *
>+ * This program is distributed in the hope that it will be useful,
>+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
>+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
>+ * GNU General Public License for more details.
>+ *
>+ * You should have received a copy of the GNU General Public License
>+ * along with this program; if not, write to the Free Software
>+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. License 
>+ * information is also available at http://www.gnu.org.
>+ *
>+ */
>+
>+/**
>+ * @author administrator
>+ *
>+ * To change the template for this generated type comment go to
>+ * Window>Preferences>Java>Code Generation>Code and Comments
>+ */
>+public interface RollingUnivariate extends StoreUnivariate {
>+
>+	/**
>+	 * @return
>+	 */
>+	public int getWindow();
>+
>+	/**
>+	 * @param i
>+	 */
>+	public void setWindow(int window);
>+}
>Index: src/java/org/apache/commons/math/RollingUnivariateImpl.java
>===================================================================
>RCS file: src/java/org/apache/commons/math/RollingUnivariateImpl.java
>diff -N src/java/org/apache/commons/math/RollingUnivariateImpl.java
>--- /dev/null	1 Jan 1970 00:00:00 -0000
>+++ src/java/org/apache/commons/math/RollingUnivariateImpl.java	15 May 2003 23:22:10 -0000
>@@ -0,0 +1,140 @@
>+/* ====================================================================
>+ * The Apache Software License, Version 1.1
>+ *
>+ * Copyright (c) 2003 The Apache Software Foundation.  All rights
>+ * reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ *
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ *
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in
>+ *    the documentation and/or other materials provided with the
>+ *    distribution.
>+ *
>+ * 3. The end-user documentation included with the redistribution, if
>+ *    any, must include the following acknowlegement:
>+ *       "This product includes software developed by the
>+ *        Apache Software Foundation (http://www.apache.org/)."
>+ *    Alternately, this acknowlegement may appear in the software itself,
>+ *    if and wherever such third-party acknowlegements normally appear.
>+ *
>+ * 4. The names "The Jakarta Project", "Commons", and "Apache Software
>+ *    Foundation" must not be used to endorse or promote products derived
>+ *    from this software without prior written permission. For written
>+ *    permission, please contact apache@apache.org.
>+ *
>+ * 5. Products derived from this software may not be called "Apache"
>+ *    nor may "Apache" appear in their names without prior written
>+ *    permission of the Apache Software Foundation.
>+ *
>+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
>+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
>+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
>+ * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
>+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
>+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
>+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
>+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
>+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
>+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
>+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
>+ * SUCH DAMAGE.
>+ * ====================================================================
>+ *
>+ * This software consists of voluntary contributions made by many
>+ * individuals on behalf of the Apache Software Foundation.  For more
>+ * information on the Apache Software Foundation, please see
>+ * <http://www.apache.org/>.
>+ */
>+package org.apache.commons.math;
>+
>+/**
>+ *
>+ * Accumulates univariate statistics for values fed in 
>+ * through the addValue() method.  Stores only the data 
>+ * over the designated window of interest.
>+ *
>+ * @author Phil Steitz
>+ * @author Mark Diggory
>+ * @version
>+ * 
>+*/
>+public class RollingUnivariateImpl extends AbstractStoreUnivariate implements RollingUnivariate{
>+
>+	/** Array of values for rolling */ 
>+	private double[] values = null;
>+	
>+	/** Array of values for rolling */ 
>+	private int index = 0;
>+		
>+	/** Window on which to calculate */
>+	private int window = 2;
>+	
>+	/** Creates new univariate */
>+	public RollingUnivariateImpl(int window){
>+		if(window < 2) throw new java.lang.IndexOutOfBoundsException("window must be greater than 2");
>+		values = new double[window];
>+	}
>+		
>+
>+	/* (non-Javadoc)
>+	 * @see org.apache.commons.math.StoreUnivariate#getValues()
>+	 */
>+	public double[] getValues() {
>+		double[] copiedArray = new double[window];
>+		System.arraycopy( values, 0, copiedArray, 0, copiedArray.length);
>+		return  copiedArray;
>+	}
>+
>+	/* (non-Javadoc)
>+	 * @see org.apache.commons.math.StoreUnivariate#getElement(int)
>+	 */
>+	public double getElement(int index) {
>+		return values[index];
>+	}
>+	
>+	/* (non-Javadoc)
>+	 * @see org.apache.commons.math.Univariate#getN()
>+	 */
>+	public double getN() {
>+		return values.length;
>+	}
>+	
>+	/* (non-Javadoc)
>+	 * @see org.apache.commons.math.Univariate#addValue(double)
>+	 */
>+	public void addValue(double v) {
>+		values[index] = v;
>+		index = (index + 1) % values.length;			
>+	}
>+
>+	/* (non-Javadoc)
>+	 * @see org.apache.commons.math.Univariate#clear()
>+	 */
>+	public void clear() {
>+		values = new double[window];
>+		this.index = 0;
>+	}
>+	
>+	/**
>+	 * @return
>+	 */
>+	public int getWindow() {
>+		return window;
>+	}
>+
>+	/**
>+	 * @param i
>+	 */
>+	public void setWindow(int window){
>+		if(window < 2) throw new java.lang.IndexOutOfBoundsException("window must be greater than 2");
>+		this.window = window;
>+		clear();
>+	}
>+
>+}
>
>  
>
>------------------------------------------------------------------------
>
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