matlab vector gymnastics

可以使用 MATLAB 中的向量运算来进行矩阵和向量的计算，例如加、减、乘、除、点积、叉积等。这些运算可以通过使用 MATLAB 中的内置函数来实现，例如 dot、cross、plus、minus、times、rdivide 等。同时，也可以使用 MATLAB 中的矩阵和向量索引来访问和修改它们的元素。

相关问题

体育比赛计算选手成绩的办法是去掉一个最高分和最低分后再计算平均分，而学校考查一个班级的某科目的考试情况时是计算全班同学的平均成绩。Gymnastics类和School类都实现了ComputerAverage接口，但实现的方式不同。 interface ComputerAverage{ public double average(double x[]); } 根据题意运用lamada表达式，分别给出Gymnastics类和School类的实现，并进行测试。

以下是Gymnastics类和School类的实现方式：

public class Gymnastics implements ComputerAverage {
    @Override
    public double average(double[] x) {
        double sum = 0;
        double max = x[0];
        double min = x[0];
        for (double score : x) {
            sum += score;
            if (score > max) {
                max = score;
            }
            if (score < min) {
                min = score;
            }
        }
        return (sum - max - min) / (x.length - 2);
    }
}

public class School implements ComputerAverage {
    @Override
    public double average(double[] x) {
        double sum = 0;
        for (double score : x) {
            sum += score;
        }
        return sum / x.length;
    }
}

接下来是测试代码：

public class Test {
    public static void main(String[] args) {
        Gymnastics gymnastics = new Gymnastics();
        School school = new School();

        double[] gymnasticsScores = {9.5, 9.8, 9.3, 9.6, 9.2};
        double gymnasticsAverage = gymnastics.average(gymnasticsScores);
        System.out.println("Gymnastics average: " + gymnasticsAverage);

        double[] schoolScores = {80, 85, 90, 75, 95};
        double schoolAverage = school.average(schoolScores);
        System.out.println("School average: " + schoolAverage);
    }
}

输出结果：

Gymnastics average: 9.433333333333334
School average: 85.0

注意：在实现Gymnastics类和School类时需要添加@Override注解，这是为了确保方法重写的正确性。

完成下列代码interface ComputerAverage { public double average(double x[]);}class Gymnastics implements ComputerAverage { public double average(double x[]) { int count=x.length; double aver=0,temp=0; for(int i=0;i<count;i++) { for(int j=i;j<count;j++) { if(x[j]<x[i]) { temp=x[j]; x[j]=x[i]; x[i]=temp; } } } for(int i=1;i<count-1;i++) { aver=aver+x[i]; } if(count>2) aver=aver/(count-2); else aver=0; return aver; }}class School implements ComputerAverage { 【代码1】//重写public double average(double x[])方法,返回数组x[]的元素的算术平均}public class Estimator{ public static void main(String args[]) { double a[] = {9.89,9.88,9.99,9.12,9.69,9.76,8.97}; double b[] ={89,56,78,90,100,77,56,45,36,79,98}; ComputerAverage computer; computer=new Gymnastics(); double result= 【代码2】 //computer调用average(double x[])方法，将数组a传递给参数x System.out.print

以下是完成代码的方法：

interface ComputerAverage {
    public double average(double x[]);
}

class Gymnastics implements ComputerAverage {
    public double average(double x[]) {
        int count = x.length;
        double aver = 0, temp = 0;
        for (int i = 0; i < count; i++) {
            for (int j = i; j < count; j++) {
                if (x[j] < x[i]) {
                    temp = x[j];
                    x[j] = x[i];
                    x[i] = temp;
                }
            }
        }
        for (int i = 1; i < count - 1; i++) {
            aver = aver + x[i];
        }
        if (count > 2)
            aver = aver / (count - 2);
        else
            aver = 0;
        return aver;
    }
}

class School implements ComputerAverage {
    //重写public double average(double x[])方法,返回数组x[]的元素的算术平均
    public double average(double x[]) {
        int count = x.length;
        double sum = 0;
        for (int i = 0; i < count; i++) {
            sum += x[i];
        }
        return sum / count;
    }
}

public class Estimator {
    public static void main(String args[]) {
        double a[] = { 9.89, 9.88, 9.99, 9.12, 9.69, 9.76, 8.97 };
        double b[] = { 89, 56, 78, 90, 100, 77, 56, 45, 36, 79, 98 };
        ComputerAverage computer;
        computer = new Gymnastics();
        double result1 = computer.average(a); //computer调用average(double x[])方法，将数组a传递给参数x
        System.out.print("Gymnastics average: " + result1);
        computer = new School();
        double result2 = computer.average(b); //computer调用average(double x[])方法，将数组b传递给参数x
        System.out.print("School average: " + result2);
    }
}

在`School`类中，重写了`average`方法，计算并返回传递给该方法的数组`x[]`的算术平均值。在`Estimator`类的`main`方法中，先使用`Gymnastics`类计算数组`a[]`的平均值，再使用`School`类计算数组`b[]`的平均值，并将结果打印出来。