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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN""http://www.w3.org/TR/REC-html40/loose.dtd"><!--NewPage--><HTML><HEAD><!-- Generated by javadoc on Thu Sep 11 11:26:54 BST 2003 --><TITLE>HistogramDataset (JFreeChart Class Library (version 0.9.12))</TITLE><META NAME="keywords" CONTENT="org.jfree.data.HistogramDataset,HistogramDataset class"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../stylesheet.css" TITLE="Style"></HEAD><SCRIPT>function asd(){parent.document.title="HistogramDataset (JFreeChart Class Library (version 0.9.12))";}</SCRIPT><BODY BGCOLOR="white" onload="asd();"><!-- ========== START OF NAVBAR ========== --><A NAME="navbar_top"><!-- --></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0"><TR><TD COLSPAN=3 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_top_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3"> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../org/jfree/data/DefaultWindDataset.html"><B>PREV CLASS</B></A> <A HREF="../../../org/jfree/data/JDBCCategoryDataset.html"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../index.html" TARGET="_top"><B>FRAMES</B></A> <A HREF="HistogramDataset.html" TARGET="_top"><B>NO FRAMES</B></A> <SCRIPT> <!-- if(window==top) { document.writeln('<A HREF="../../../allclasses-noframe.html" TARGET=""><B>All Classes</B></A>'); } //--></SCRIPT><NOSCRIPT><A HREF="../../../allclasses-noframe.html" TARGET=""><B>All Classes</B></A></NOSCRIPT></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: NESTED | <A HREF="#field_summary">FIELD</A> | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: <A HREF="#field_detail">FIELD</A> | <A HREF="#constructor_detail">CONSTR</A> | <A HREF="#method_detail">METHOD</A></FONT></TD></TR></TABLE><!-- =========== END OF NAVBAR =========== --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">org.jfree.data</FONT><BR>Class HistogramDataset</H2><PRE>java.lang.Object | +--<A HREF="../../../org/jfree/data/AbstractDataset.html">org.jfree.data.AbstractDataset</A> | +--<B>org.jfree.data.HistogramDataset</B></PRE><DL><DT><B>All Implemented Interfaces:</B> <DD>java.lang.Cloneable, <A HREF="../../../org/jfree/data/Dataset.html">Dataset</A>, <A HREF="../../../org/jfree/data/IntervalXYDataset.html">IntervalXYDataset</A>, java.io.ObjectInputValidation, java.io.Serializable, <A HREF="../../../org/jfree/data/SeriesDataset.html">SeriesDataset</A>, <A HREF="../../../org/jfree/data/XYDataset.html">XYDataset</A></DD></DL><HR><DL><DT>public class <B>HistogramDataset</B><DT>extends <A HREF="../../../org/jfree/data/AbstractDataset.html">AbstractDataset</A><DT>implements <A HREF="../../../org/jfree/data/IntervalXYDataset.html">IntervalXYDataset</A></DL><P>A dataset that can be used for creating histograms. <p> See the <code>HistogramDemo.java</code> file in the JFreeChart distribution for an example.<P><P><DL><DT><B>Author:</B></DT> <DD>Jelai Wang, jelaiw AT mindspring.com</DD><DT><B>See Also:</B><DD><A HREF="../../../serialized-form.html" TARGET="org.jfree.data.HistogramDataset">Serialized Form</A></DL><HR><P><!-- ======== NESTED CLASS SUMMARY ======== --><!-- =========== FIELD SUMMARY =========== --><A NAME="field_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Field Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static org.jfree.data.HistogramDataset.HistogramType</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/jfree/data/HistogramDataset.html#FREQUENCY">FREQUENCY</A></B></CODE><BR> A constant to indicate a frequency histogram.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static org.jfree.data.HistogramDataset.HistogramType</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/jfree/data/HistogramDataset.html#RELATIVE_FREQUENCY">RELATIVE_FREQUENCY</A></B></CODE><BR> A constant to indicate a relative frequency histogram.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static org.jfree.data.HistogramDataset.HistogramType</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/jfree/data/HistogramDataset.html#SCALE_AREA_TO_1">SCALE_AREA_TO_1</A></B></CODE><BR> A constant to indicate...</TD></TR></TABLE> <!-- ======== CONSTRUCTOR SUMMARY ======== --><A NAME="constructor_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Constructor Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../org/jfree/data/HistogramDataset.html#HistogramDataset()">HistogramDataset</A></B>()</CODE><BR> </TD></TR></TABLE> <!-- ========== METHOD SUMMARY =========== --><A NAME="method_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Method Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/jfree/data/HistogramDataset.html#addSeries(java.lang.String, double[], int)">addSeries</A></B>(java.lang.String name, double[] values, int numberOfBins)</CODE><BR> Adds a series.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> java.lang.Number</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/jfree/data/HistogramDataset.html#getEndXValue(int, int)">getEndXValue</A></B>(int series, int item)</CODE><BR> Returns the end value for a bin.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> java.lang.Number</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/jfree/data/HistogramDataset.html#getEndYValue(int, int)">getEndYValue</A></B>(int series, int item)</CODE><BR> Returns the Y value for a bin.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> int</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/jfree/data/HistogramDataset.html#getItemCount(int)">getItemCount</A></B>(int series)</CODE><BR> Returns the number of data items for a series.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> int</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/jfree/data/HistogramDataset.html#getSeriesCount()">getSeriesCount</A></B>()</CODE><BR> Returns the number of series in the dataset.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> java.lang.String</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/jfree/data/HistogramDataset.html#getSeriesName(int)">getSeriesName</A></B>(int series)</CODE><BR> Returns the name for a series.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> java.lang.Number</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/jfree/data/HistogramDataset.html#getStartXValue(int, int)">getStartXValue</A></B>(int series, int item)</CODE><BR> Returns the start value for a bin.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> java.lang.Number</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/jfree/data/HistogramDataset.html#getStartYValue(int, int)">getStartYValue</A></B>(int series, int item)</CODE><BR> Returns the Y value for a bin.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> org.jfree.data.HistogramDataset.HistogramType</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/jfree/data/HistogramDataset.html#getType()">getType</A></B>()</CODE><BR> Returns the histogram type.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> java.lang.Number</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/jfree/data/HistogramDataset.html#getXValue(int, int)">getXValue</A></B>(int series, int item)</CODE><BR> Returns the X value for a bin.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> java.lang.Number</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/jfree/data/HistogramDataset.html#getYValue(int, int)">getYValue</A></B>(int series, int item)</CODE><BR> Returns the Y value for a bin.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/jfree/data/HistogramDataset.html#setType(org.jfree.data.HistogramDataset.HistogramType)">setType</A></B>(org.jfree.data.HistogramDataset.HistogramType type)</CODE><BR> Sets the histogream type.</TD></TR></TABLE> <A NAME="methods_inherited_from_class_org.jfree.data.AbstractDataset"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Methods inherited from class org.jfree.data.<A HREF="../../../org/jfree/data/AbstractDataset.html">AbstractDataset</A></B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="../../../org/jfree/data/AbstractDataset.html#addChangeListener(org.jfree.data.DatasetChangeListener)">addChangeListener</A>, <A HREF="../../../org/jfree/data/AbstractDataset.html#clone()">clone</A>, <A HREF="../../../org/jfree/data/AbstractDataset.html#fireDatasetChanged()">fireDatasetChanged</A>, <A HREF="../../../org/jfree/data/AbstractDataset.html#getGroup()">getGroup</A>, <A HREF="../../../org/jfree/data/AbstractDataset.html#notifyListeners(org.jfree.data.DatasetChangeEvent)">notifyListeners</A>, <A HREF="../../../org/jfree/data/AbstractDataset.html#removeChangeListener(org.jfree.data.DatasetChangeListener)">removeChangeListener</A>, <A HREF="../../../org/jfree/data/AbstractDataset.html#setGroup(org.jfree.data.DatasetGroup)">setGroup</A>, <A HREF="../../../org/jfree/data/AbstractDataset.html#validateObject()">validateObject</A></CODE></TD></TR></TABLE> <A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Methods inherited from class java.lang.Object</B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE>equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD></TR></TABLE> <A NAME="methods_inherited_from_class_org.jfree.data.Dataset"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Methods inherited from interface org.jfree.data.<A HREF="../../../org/jfree/data/Dataset.html">Dataset</A></B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="../../../org/jfree/data/Dataset.html#addChangeListener(org.jfree.data.DatasetChangeListener)">addChangeListener</A>, <A HREF="../../../org/jfree/data/Dataset.html#getGroup()">getGroup</A>, <A HREF="../../../org/jfree/data/Dataset.html#removeChangeListener(org.jfree.data.DatasetChangeListener)">removeChangeListener</A>, <A HREF="../../../org/jfree/data/Dataset.html#setGroup(org.jfree.data.DatasetGroup)">setGroup</A></CODE></TD></TR></TABLE> <P><!-- ============ FIELD DETAIL =========== --><A NAME="field_detail"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=1><FONT SIZE="+2"><B>Field Detail</B></FONT></TD></TR></TABLE><A NAME="FREQUENCY"><!-- --></A><H3>FREQUENCY</H3><PRE>public static final org.jfree.data.HistogramDataset.HistogramType <B>FREQUENCY</B></PRE><DL><DD>A constant to indicate a frequency histogram.<P><DL></DL></DL><HR>⌨️ 快捷键说明
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