lt6_2_1.m

几个简单的MATLAB源代码

%例题6.2.1
%给出向量x和y，利用下面的程序代码可以
%绘制散点图、求出方差分析表、求出回归线，
%并在一个图像窗口中画出散点图和回归线图，
%还计算出可决系数r2和最小二乘回归的估计标准误差Sy
x=[255.7,263.3,275.4,278.3,296.7,309.3,315.8,318.8,330.0,340.2,350.7,367.3,381.3,406.5,430.8,451.5];
y=[116.5,120.8,124.4,125.5,131.7,136.2,138.7,140.2,146.8,149.6,153.0,158.2,163.2,170.5,178.2,185.9];
xx=x(end).*1.045.^(1:5);
p=0.95;
%%%%%%%%以下为计算部分不可改动
xxhg1(x,y,xx,p);