搜搜做题作业网matlab 直线拟合
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matlab 直线拟合
x=(0.4,0.8,1.2,1.6,2.0)
y=(0.067,0.143,0.231,0.308,0.374)
用matlab拟合一条y=kx+b的直线
急用,有谢的,赶快呀,呵呵!
x=(0.4,0.8,1.2,1.6,2.0)
y=(0.067,0.143,0.231,0.308,0.374)
用matlab拟合一条y=kx+b的直线
急用,有谢的,赶快呀,呵呵!
x=[0.4,0.8,1.2,1.6,2.0];
>> y=[0.067,0.143,0.231,0.308,0.374];
>> p=polyfit(x,y,1);
>> xx=0:.1:2;
>> plot(x,y,'o',xx,polyval(p,xx))
>> poly2sym(p,'x')
ans =
779/4000*x-5245792845961277/576460752303423488
>> vpa(ans,8)
ans =
.19475000*x-.91000000e-2
即y=0.19475x-0.0091
>> y=[0.067,0.143,0.231,0.308,0.374];
>> p=polyfit(x,y,1);
>> xx=0:.1:2;
>> plot(x,y,'o',xx,polyval(p,xx))
>> poly2sym(p,'x')
ans =
779/4000*x-5245792845961277/576460752303423488
>> vpa(ans,8)
ans =
.19475000*x-.91000000e-2
即y=0.19475x-0.0091