4.5556e+04
>> y14=polyval(a,21233)
y14 =
4.5299e+04
>> y15=polyval(a,30309)
y15 =
4.1342e+04
>> y16=polyval(a,25181)
y16 =
4.5416e+04
>> y17=polyval(a,26731)
y17 =
4.4747e+04
>> y18=polyval(a,34374)
y18 =
3.3763e+04
>> y19=polyval(a,31793)
y19 =
3.9070e+04
>> y20=polyval(a,27318.9)
y20 =
4.4374e+04
>> y21=polyval(a,32516.3)
y21 =
3.7763e+04
>> y22=polyval(a,16297.32)
y22 =
4.2370e+04
>> y23=polyval(a,19966.06)
y23 =
4.4795e+04
>> y24=polyval(a,24631.94)
y24 =
4.5548e+04
>> y25=polyval(a,25063.82)
y25 =
4.5449e+04
粮食产量和农业机械总动力的拟合 >>
y0=[38728,40731,37911,39151,40208,39408,40755,44624,43529,44264,45649,44510,46662,50454,49417,51230,50839,46218,45264,45706,4307,46947,48402,49804,50160]; >>
x0=[18022,19497,20913,22950,24836,26575,28067,28707.7,29388.6,30308.4,31816.6,33802.5,36118.1,38546.9,42015.6,45207.7,48996.12,52573.6063,55172.1,57929.85,60386.541,64027.91,68397.8486,72522.1234,76589.56346]; >> a=polyfit(x0,y0,3) a =
1.0e+04 *
0.0000 -0.0000 0.0005 -2.1951
>> y1=polyval(a,18002) y1 =
3.4164e+04
>> y2=polyval(a,19497) y2 =
3.6507e+04
>> y3=polyval(a,20913) y3 =
3.8463e+04
>> y3=polyval(a,22950) y3 =
4.0852e+04
>> y4=polyval(a,24836) y4 =
4.2648e+04
>> y5=polyval(a,26575) y5 =
4.3976e+04
>> y6=polyval(a,28067) y6 =
4.4883e+04
>> y7=polyval(a,28707.7)
y7 =
4.5211e+04
>> y8=polyval(a,29388.6) y8 =
4.5520e+04
>> y9=polyval(a,30308.4) y9 =
4.5877e+04
>> y10=polyval(a,31816.6)
y10 =
4.6318e+04
>> y11=polyval(a,33802.5)
y11 =
4.6649e+04
>> y12=polyval(a,36118.1)
y12 =
4.6720e+04
>> y13=polyval(a,38546.9)
y13 =
4.6488e+04
>> y14=polyval(a,42015.6)
y14 =
4.5738e+04
>> y15=polyval(a,45207.7)
y15 =
4.4757e+04
>> y16=polyval(a,48996.12)
y16 =
4.3435e+04
>> y17=polyval(a,52573.6063)
y17 =
4.2239e+04
>> y18=polyval(a,55172.1)
y18 =
4.1521e+04
>> y19=polyval(a,57929.85)
y19 =
4.0996e+04
>> y20=polyval(a,60386.541)
y20 =
4.0808e+04
>> y21=polyval(a,64027.91)
y21 =
4.1162e+04