cise 301

^^

عند مين انت؟

 

Up

 

يا اخوان وشو الهرجة
إيش المقصود بالكمبيوتر هومورك أصلاً
شفت السؤال الكتاب ماله دخل بالكمبيوتر
السؤال الي تحته إيه أما هو ما عرفت له والله

 

طيب يا حلوين .. روميتي الله يجزاه خير حله (الرجال سوفتوير انجينيرنق)



public classLeastSquare{
public static void main(String[] args){
problem17_3();
System.out.println("");
problem17_17();
}

public static void problem17_3(){
int n = 10;

double[] xAxis = {0, 2, 4, 6, 9, 11, 12, 15, 17, 19};
double[] yAxis = {5, 6, 7, 6, 9, 8, 7, 10, 12, 12};

double summationX = 0;
double summationY = 0;
double summationXY = 0;
double summationXX = 0;

for(int i = 0; i < n; i++)
summationX += xAxis;

for(int i = 0; i < n; i++)
summationY += yAxis;

for(int i = 0; i < n; i++)
summationXY += xAxis * yAxis;

for(int i = 0; i < n; i++)
summationXX += xAxis * xAxis;

double xAverage = summationX / n;
double yAverage = summationY / n;
double a = (summationXY - ((summationX * summationY) / n)) / (summationXX - ((summationX * summationX) / n));
double m = yAverage - (a * xAverage);
double[] yHat = new double[n];

double standard = 0;

for(int i = 0; i < n; i++)
yHat = (m + (a * xAxis));

for(int i = 0; i < n; i++)
standard += (yAxis - yHat) * (yAxis - yHat);
// standard = sum of (y - y')^2
double sd = Math.sqrt((standard / 8));
// sd = standard deviation
System.out.println("Problem 17.3");
System.out.println("a = " + a);
System.out.println("m = " + m);
System.out.println("Y' = " + m + " + " + a+ " * X");
System.out.println("Standard Deviation = " + sd);
}

public static void problem17_17(){
int n = 8;

double[] xAxis = {3, 4, 5, 7, 8, 9, 11, 12};
double[] yAxis = {1.6, 3.6, 4.4, 3.4, 2.2, 2.8, 3.8, 4.6};

double summationX = 0;
double summationY = 0;
double summationXY = 0;
double summationXX = 0;

for(int i = 0; i < n; i++)
summationX += xAxis;

for(int i = 0; i < n; i++)
summationY += yAxis;

for(int i = 0; i < n; i++)
summationXY += xAxis * yAxis;

for(int i = 0; i < n; i++)
summationXX += xAxis * xAxis;

double xAverage = summationX / n;
double yAverage = summationY / n;
double a = (summationXY - ((summationX * summationY) / n)) / (summationXX - ((summationX * summationX) / n));
double m = yAverage - (a * xAverage);
double[] yHat = new double[n];

double standard = 0;

for(int i = 0; i < n; i++)
yHat[i] = (m + (a * xAxis[i]));

for(int i = 0; i < n; i++)
standard += (yAxis[i] - yHat[i]) * (yAxis[i] - yHat[i]);
// standard = sum of (y - y')^2
double sd = Math.sqrt((standard / 6));
// sd = standard deviation
System.out.println("Problem 17.17");
System.out.println("a = " + a);
System.out.println("m = " + m);
System.out.println("Y' = " + m + " + " + a+ " * X");
System.out.println("Standard Deviation = " + sd);
}
}

بس ترى السؤالين محلولين كلهم على انه لينيار فت .. طنشنا الكيوبك فت

بالتوفيق

اللغة المستخدمة .. جافا[/i][/i][/i][/i][/i][/i][i][i][i][i][i][/i][/i][/i][/i][/i][i][i][i][i][/i][/i][/i][/i]