[matlab二分法程序代码]matlab牛顿迭代法程序代码

[matlab二分法程序代码]matlab牛顿迭代法程序代码

篇一 : matlab牛顿迭代法程序代码 牛顿迭代法 主程序： function?[k,x,wuca,yx]?=?newton k=1; yx1=fun; yx2=fun1; x1=x0-yx1/yx2; while?abs>tol x0=x1; yx1=fun; yx2=fun1; k=k+1; x1=x1-yx1/yx2; end k; x=x1; wuca=abs/2; yx=fun; end

分程序1： function?y1=fun y1=sqrt-tan; end

分程序2： function????y2=fun1 %函数fun的导数 y2=x/)-1/) ); end

结果： [k,x,wuca,yx]?=?newton

k?=8 x?=0.9415 wuca?=4.5712e-08 yx?=-3.1530e-14

[k,x,wuca,yx]?=?newton k?=243 x?=NaN wuca?=NaN yx?=NaN篇二 : 二十个JAVA程序代码 1百分制分数到等级分数 package pm; public class SwitchTest { //编写程序，实现从百分制分数到等级分数的转换 // //>=90 A // 80~89 B // 70~79 C // 60~69 D // public static void main { int s=87; switch{ case 10 :System.out.println;break; case 9 :System.out.println;break; case 8 :System.out.println;break; case 7 :System.out.println;break; case 6 :System.out.println;break; default :System.out.println;break; } } } 2成法口诀阵形 package pm; public class SwitchTest{ public static void main{ for{ for{ System.out.print+”\t”); } System.out.println; } } } 3华氏和摄氏的转换法 package pm; import java.util.Scanner; public class SwitchTest { public static void main { Scanner sc=new Scanner; while { System.out.println; String s = sc.next.trim; if ) { //做摄氏向华摄的转换 System.out.println; double db = sc.nextDouble; double db2 = + 32; System.out.println; } else if ) { //做华摄向摄氏的转换 System.out.println; double db = sc.nextDouble; double db2 = * 5 / 9; System.out.println + “C”); }else if){ break; } } } } package pm; import java.util.Scanner; public class SwitchTest{ public static void main { Scanner sc=new Scanner; boolean flag=true; while { System.out.println; String str = sc.nextLine.trim; if || str.endsWith) { //做摄氏向华摄的转换 30c String st = str.substring - 1); double db = Double.parseDouble;//[0,2) //2 double db=Double.valueOf.doubleValue; double db2 = + 32; System.out.println; } else if || str.endsWith) { //做华摄向摄氏的转换 String st = str.substring - 1); double db = Double.parseDouble;//[0,2) //2 double db=Double.valueOf.doubleValue; double db2 = * 5 / 9; System.out.println + “C”); }else if){ flag=false; } } } } 4三个数的最大数 package pm; public class SwitchTest { public static void main { int a=1,b=2,c=3,d=0; d=a>b?a:b; d=a>b?:; System.out.println; } } 5简单计算器的小程序 package one; import java.awt.BorderLayout; import java.awt.GridLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JTextField; public class Jsq implements ActionListener { private JFrame frame; private JButton[] bus; private JTextField jtx; private JButton bu; private char[] strs; private String d_one = ““; private String operator; public static void main { new Jsq; } /* 利用构造进行实例化 */ public Jsq { frame = new JFrame; jtx = new JTextField; bus = new JButton[16]; strs = “789/456*123-0.+=“.toCharArray; for { bus[i] = new JButton; bus[i].addActionListener; } bu = new JButton; bu.addActionListener; init; } /* GUI 初始化 */ public void init { JPanel jp1 = new JPanel; jp1.add; jp1.add; frame.add; } /* 事件的处理 */ public void actionPerformed { /*获取输入字符*/ String conn = arg0.getActionCommand; /*清除计算器内容*/ if ) { JPanel jp2 = new JPanel; jp2.setLayout); for { jp2.add; } frame.add; frame.pack; frame.setLocation; frame.setVisible; frame.setDefaultCloseOperation; d_one = ““; operator = ““; jtx.setText; return; } /*暂未实现该功能*/ if){ return; } /*记录运算符，保存运算数字*/ if ) != -1) { if && ““.equals)) return; d_one = jtx.getText; operator = conn; jtx.setText; return; } /*计算结果*/ if ) { if && ““.equals)) return; double db = 0; if ) { db = Double.parseDouble + Double.parseDouble); jtx.setText; } if ) { db = Double.parseDouble - Double.parseDouble); jtx.setText; } if ) { db = Double.parseDouble * Double.parseDouble); jtx.setText; } if ) { db = Double.parseDouble / Double.parseDouble); jtx.setText; } d_one = db + ““; return; } //界面显示 jtx.setText + conn); } } 6三角形图案 package pm; public class SwitchTest{ public static void main{ int n=5; for{ for{ System.out.print; } for{