Assume these variables are already defined: X_list - list of x values Y_list - l
ID: 3598560 • Letter: A
Question
Assume these variables are already defined:
X_list - list of x values
Y_list - list of y values
X - single x value
Write a MATLAB code segment that uses nlinfit to determine the best fit curve for the points in X_list and Y_list according to this equation
where A, B, and C are constants. Use initial guesses of A = 1, B = 2, and C = 0.
Your results should be stored in a structure named fitData with the following fields:
Example:
Should display this result in the command window
Your code should work for any set of starting values. Do not include test cases, clear all, etc as part of your submission.
Explanation / Answer
package com;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Graphics;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.event.MouseEvent;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Random;
import javax.swing.JPanel;
import javax.swing.JToggleButton;
import javax.swing.JToolBar;
import javax.swing.JFrame;
import java.util.Timer;
import java.util.TimerTask;
import javax.swing.border.EtchedBorder;
class GlobalVariables {
public ArrayList<Fish> mFish;
public FishTank mFishTank;
private GlobalVariables() {
mFish = new ArrayList<Fish>();
mFishTank = new FishTank();
}
private static GlobalVariables instance;
public static GlobalVariables getInstance() {
if (instance == null){
instance = new GlobalVariables();
}
return instance;
}
}
class Fish implements Comparable<Fish>{
int mX;
int mY;
int mId;
Color mColor;
public Fish(int id, int x, int y, Color color){
mId = id;
mX = x;
mY = y;
mColor = color;
}
public void paint(Graphics g){
// Implement this function
}
public void move(){
// Implement this function
}
@Override
public int compareTo(Fish o) {
return mId;
// Implement this function
}
}
class FishTick extends TimerTask{
@Override
public void run() {
if (FishTank.mSimulateStatus){
for (int x=0;x<GlobalVariables.getInstance().mFish.size();x++){
Fish f = GlobalVariables.getInstance().mFish.get(x);
f.move();
GlobalVariables.getInstance().mFish.set(x, f);
}
GlobalVariables.getInstance().mFishTank.mDrawPanel.paint();
}
}
}
public class FishTank extends javax.swing.JFrame implements java.awt.event.MouseListener, java.awt.event.MouseMotionListener{
private final int mNumRows = 20;
private final int mNumCols = 20;
private final int mGridSz = 30;
private int mSelectedFishIndex = -1;
private boolean mDragged = false;
private int mTopHeight;
JToolBar mToolbar;
JToggleButton mSimulationButton;
DrawPanel mDrawPanel;
private int mFishIndex = 0;
static public boolean mSimulateStatus = false;
public static void main(String[] args) {
GlobalVariables global = GlobalVariables.getInstance();
if (global == null){
System.out.println("Cannot initialize, exiting ....");
return;
}
}
private JToggleButton addButton(String title){
JToggleButton button = new JToggleButton(title);
button.addItemListener(new ItemListener() {
public void itemStateChanged(ItemEvent ev) {
mSimulateStatus = !mSimulateStatus;
}
});
this.mToolbar.add(button);
return (button);
}
public FishTank()
{
JFrame guiFrame = new JFrame();
guiFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
guiFrame.setTitle("MY FISH TANK");
// Create a toolbar and give it an etched border.
this.mToolbar = new JToolBar();
this.mToolbar.setBorder(new EtchedBorder());
mSimulationButton = addButton("Simulate");
this.mToolbar.add(mSimulationButton);
//This will center the JFrame in the middle of the screen
guiFrame.setLocationRelativeTo(null);
this.mDrawPanel = new DrawPanel(mNumRows, mNumCols, mGridSz);
this.mDrawPanel.setBackground(Color.cyan);
this.mDrawPanel.paint();
guiFrame.add(mDrawPanel);
guiFrame.add(this.mToolbar, BorderLayout.NORTH);
// Add the Exit Action
JButton button = new JButton("Quit");
button.setToolTipText("Quit the program");
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.exit(0);
}
});
mToolbar.add(button);
guiFrame.addMouseListener(this);
guiFrame.addMouseMotionListener(this);
//make sure the JFrame is visible
guiFrame.setVisible(true);
mTopHeight = guiFrame.getInsets().top + mToolbar.getHeight();
guiFrame.setSize(mNumRows * mGridSz, mNumCols * mGridSz + mTopHeight);
Timer timer = new Timer("tick", true);
timer.scheduleAtFixedRate(new FishTick(), Calendar.getInstance().get(Calendar.MILLISECOND), 500);
}
@Override
public void mouseClicked(MouseEvent e) {
// Implement this function
}
@Override
public void mousePressed(MouseEvent e) {
}
@Override
public void mouseReleased(MouseEvent e) {
// Implement this function
}
@Override
public void mouseEntered(MouseEvent e) {
}
@Override
public void mouseExited(MouseEvent e) {
}
@Override
public void mouseDragged(MouseEvent e) {
// Implement this function
}
@Override
public void mouseMoved(MouseEvent e) {
}
}
class DrawPanel extends JPanel{
int mRows;
int mCols;
int mGridSz;
int maxGridSz;
ArrayList<Fish> mFish;
public DrawPanel(int numberOfRows, int numberOfCols, int gridSz){
mGridSz = gridSz;
mRows = numberOfRows;
mCols = numberOfCols;
maxGridSz = mGridSz * mRows;
}
private void paintBackground(Graphics g){
for (int i = 1; i < mRows; i++) {
g.drawLine(i * mGridSz, 0, i * mGridSz, maxGridSz);
}
for (int mAnimateStatus = 1; mAnimateStatus < mCols; mAnimateStatus++) {
g.drawLine(0, mAnimateStatus * mGridSz, maxGridSz, mAnimateStatus * mGridSz);
}
}
@Override
public void paintComponent(Graphics g){
super.paintComponent(g);
paintBackground(g);
for (Fish f:GlobalVariables.getInstance().mFish){
f.paint(g);
}
}
public void paint(){
repaint();
}
}