java实现FIR线性缓冲区

         作者：sundroid

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package com.fir;import java.awt.Color;import java.awt.Font;import java.util.Random;import javax.swing.JPanel;import org.jfree.chart.ChartFactory;import org.jfree.chart.ChartPanel;import org.jfree.chart.ChartUtilities;import org.jfree.chart.JFreeChart;import org.jfree.chart.StandardChartTheme;import org.jfree.chart.axis.NumberAxis;import org.jfree.chart.plot.XYPlot;import org.jfree.chart.renderer.xy.XYSplineRenderer;import org.jfree.data.xy.XYDataset;import org.jfree.data.xy.XYSeries;import org.jfree.data.xy.XYSeriesCollection;import org.jfree.ui.ApplicationFrame;import org.jfree.ui.RectangleInsets;import org.jfree.ui.RefineryUtilities;public class FIR extends ApplicationFrame {/** *  */private static final long serialVersionUID = 1L;static double y[] = new double[40];private XYDataset data1;public FIR(String title) {super(title);JPanel jpanel = createChartPanel1();add(jpanel);}private XYDataset createSampleData() {XYSeries xyseries = new XYSeries("");for (int i = 0; i < y.length; i++) {xyseries.add(i, y[i]);}XYSeriesCollection xyseriescollection = new XYSeriesCollection(xyseries);return xyseriescollection;}private ChartPanel createChartPanel1() {StandardChartTheme standardChartTheme = new StandardChartTheme("CN"); // 创建主题样式standardChartTheme.setExtraLargeFont(new Font("微软雅黑", Font.BOLD, 20)); // 设置标题字体standardChartTheme.setRegularFont(new Font("宋体", Font.PLAIN, 16)); // 设置图例的字体standardChartTheme.setLargeFont(new Font("宋体", Font.PLAIN, 16)); // 设置轴向的字体ChartFactory.setChartTheme(standardChartTheme); // 应用主题样式data1 = createSampleData();NumberAxis numberaxis = new NumberAxis("Y");numberaxis.setAutoRangeIncludesZero(false);NumberAxis numberaxis1 = new NumberAxis("X");numberaxis1.setAutoRangeIncludesZero(false);XYSplineRenderer xysplinerenderer = new XYSplineRenderer();XYPlot xyplot = new XYPlot(data1, numberaxis, numberaxis1,xysplinerenderer);xyplot.setBackgroundPaint(Color.lightGray);xyplot.setDomainGridlinePaint(Color.white);xyplot.setRangeGridlinePaint(Color.white);xyplot.setAxisOffset(new RectangleInsets(4D, 4D, 4D, 4D));JFreeChart jfreechart = new JFreeChart("线性缓冲区 ",JFreeChart.DEFAULT_TITLE_FONT, xyplot, true);ChartUtilities.applyCurrentTheme(jfreechart);ChartPanel chartpanel = new ChartPanel(jfreechart);return chartpanel;}public static void main(String[] agrs) {Random random = new Random();double x[] = new double[40];// int[] array = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };//// moveNum(array);// for (int i = 0; i < array.length; i++) {//// System.out.println("array" + array[i]);// }double c[] = { -7.0 / 10000, 3.0 / 10000, 14.0 / 10000, 10.0 / 10000,-16.0 / 10000, -38.0 / 10000, -8.0 / 10000, 64.0 / 10000,81.0 / 10000, -30.0 / 10000, -169.0 / 10000, -118.0 / 10000,162.0 / 10000, 353.0 / 10000, 83.0 / 10000, -515.0 / 10000,-689.0 / 10000, 247.0 / 10000, 2051.0 / 10000, 3523.0 / 10000,3523.0 / 10000, 2051.0 / 10000, 247.0 / 10000, -689.0 / 10000,-515.0 / 10000, 83.0 / 10000, 353.0 / 10000, 162.0 / 10000,-118.0 / 10000, -169.0 / 10000, -30.0 / 10000, 81.0 / 10000,64.0 / 10000, -8.0 / 10000, -38.0 / 10000, -16.0 / 10000,10.0 / 10000, 14.0 / 10000, 3.0 / 10000, -7.0 / 10000 };// for (int i = 0; i < c.length; i++) {// System.out.print("\n" + "C" + i + "--->" + c[i]);// }for (int i = 0; i < x.length; i++) {x[0]=1;x[i]=0;}for (int i = 0; i < x.length; i++) {System.out.print("\n" + "X" + i + "--->" + x[i]);}for (int i = 0; i < c.length; i++) {// 执行一次后再开始执行数组移位 if (i >= 1) { moveNum(x); System.out.println("\n数组第" + i + "次移位"); outNum(x); }// 直接开始用移位后的数组执行下面的算法//moveNum(x);//System.out.println("数组第" + i + "次移位");//outNum(x);for (int b = 0; b < c.length; b++) {y[i] += x[b] * c[40 - b - 1];}// System.out.println("\nRESULT[" + i + "]=" + y[i]);}FIR show = new FIR("线性缓冲区");show.pack();RefineryUtilities.centerFrameOnScreen(show);show.setVisible(true);// System.out.println("-----------" + y.length);}private static void moveNum(double[] n) {// 数组元素右移位double temp = n[n.length - 1];for (int i = n.length - 1; i > 0; i--) {n[i] = n[i - 1];}n[0] = temp;}private static void outNum(double[] n) {// 输出数组for (int i = 0; i < n.length; i++) {System.out.print("X" + i + "-----" + n[i]+"\n");}}}