Question

用MATLAB按图片要求写出操作步骤代码，十分感谢

Answer 1

题1的代码及图形

题2第一小题的代码

x=0.1:0.1:1.0;

y=[1.987,3.28,6.16,7.08,7.34,7.66,9.58,9.48,9.30,11.2];

plot(x,y,'k*')

xlabel('x'),ylabel('y');

题2第二小题的代码

x=0.1:0.1:1.0;

y=[1.987,3.28,6.16,7.08,7.34,7.66,9.58,9.48,9.30,11.2];

p=polyfit(x,y,2);

xi=0.1:0.1:1.0;

yi=polyval(p,xi);

plot(x,y,'k*',xi,yi,'r-');

xlabel('x'),ylabel('y');