数学建模，复合肥料的问题(3)

5.8b51+3.1b52-b53+1.2b54+2b55>=0 5.8b61+3.1b62-b63+1.2b64+2b65>=0 end

9.2 价格变化矩阵求解

a=[1650 1800 1950 1650 1725 1950 1950 1650 1350 1725 1650 2100 1950 1500 1425 1800 1650 1800 1800 1875 1500 1800 2250 1650 1575 1350 1500 2100 1200 2025]; for x=1:20

b=[1,1+x/100,1+2*x/100,1+3*x/100,1+4*x/100,1+5*x/100]'; b1=b*ones(1,2);

c=[1,1+2*x/100,1+4*x/100,1+6*x/100,1+8*x/100,1+10*x/100]'; c1=c*ones(1,3); d=[b1,c1]; a.*d end

9.3 求拟合函数 x=1:20;

a=[6484834,6289528,6094222, 5898916, 5707361, 5537694, 5369228, 5236272, 5139618, 5059861, 5022861, 4985861, 4956639, 4931889, 4925139, 4918389, 4911639, 4904889, 4898139, 4891389]; [p,s]=polyfit(x,a,2); P

9.4 求拟合函数图形和原函数图形 x=1:20;

a=[6484834,6289528,6094222, 5898916, 5707361, 5537694, 5369228, 5236272, 5139618, 5059861, 5022861, 4985861, 4956639, 4931889, 4925139, 4918389, 4911639, 4904889, 4898139, 4891389]; h=polyfit(x,a,2);

Q(x)=7300*x.^2 -232300*x+6693100; plot(x,Q,'-*',x,a,'*') shading flat

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

9.5 求可决系数 x=[1: 20];

Q(x)=7300*x.^2-232300*x+6693100;

a=[6484834,6289528,6094222, 5898916, 5707361, 5537694, 5369228, 5236272, 5139618, 5059861, 5022861, 4985861, 4956639, 4931889, 4925139, 4918389, 4911639,

11

4904889, 4898139, 4891389];

Y=1-sum((a-Q).^2)/sum((a-mean(a)).^2)

9.6 价格变化矩阵结果 ans =

1.0e+003 *

1.6500 1.8000 1.9500 1.6500 1.7250 1.9695 1.6830 1.8540 1.5600 1.4175

ans =

1.0e+003 *

1.6500 1.9890 1.7160 1.9080 1.6200 1.4850

ans =

1.0e+003 *

1.6500 2.0085 1.7490 1.9620 1.6800 1.5525

ans =

1.0e+003 *

1.9695 1.6830 2.1420 2.0280 1.6995 1.9080 1.8720 2.4300 1.5750 2.3100 1.8000 1.9500 1.9890 1.7160 2.1840 2.1060 1.7490 2.0160 1.9440 2.6100 1.6500 2.5200 1.8000 1.9500 2.0085 1.7490 2.2260 2.1840 1.7985 2.1240 2.0160 2.7900 1.7250 2.7300 1.3770 1.5600 1.9080 1.7820 1.3200 1.6500 1.4040 1.6200 2.0160 1.9140 1.4400 1.6500 1.4310 1.6800 2.1240 2.0460 1.5600 12

1.7595 1.4820 1.9875 1.7010 2.2275 1.7250 1.7940 1.5390 2.1000 1.8270 2.4300 1.7250 1.8285 1.5960 2.2125 1.9530 2.6325 1.6500 1.8000 1.9500 1.6500 1.7250 2.0280 2.0280 1.7820 1.4580 1.8630 1.7820 2.2680 2.2620 1.7400 1.6530 2.0160 1.8480 2.2320 2.2320 2.3250 1.7400 2.0880 2.9700 2.1780 2.0790 1.6200 1.8000 2.9400 1.6800 2.8350

ans =

1.0e+003 *

1.6500 2.0475 1.8150 2.0700 1.8000 1.6875

ans =

1.0e+003 *

1.6500 2.0670 1.8480 2.1240 1.8600 1.7550

ans =

1.0e+003 *

1.6500 2.0865 1.8810 2.1780 1.9200 1.8225

1.8000 1.9500 2.0475 1.8150 2.3100 2.3400 1.8975 2.3400 2.1600 3.1500 1.8750 3.1500 1.8000 1.9500 2.0670 1.8480 2.3520 2.4180 1.9470 2.4480 2.2320 3.3300 1.9500 3.3600 1.8000 1.9500 2.0865 1.8810 2.3940 2.4960 1.9965 2.5560 2.3040 3.5100 2.0250 3.5700 1.6500 1.4850 1.8000 2.3400 2.3100 1.8000 1.6500 1.5120 1.8600 2.4480 2.4420 1.9200 1.6500 1.5390 1.9200 2.5560 2.5740 2.0400 13

1.7250 1.8975 1.7100 2.4375 2.2050 3.0375 1.7250 1.9320 1.7670 2.5500 2.3310 3.2400 1.7250 1.9665 1.8240 2.6625 2.4570 3.4425 ans =

1.0e+003 *

1.6500 1.8000 1.9500 1.6500 1.7250 2.1060 2.1060 1.9140 1.5660 2.0010 1.9140 2.4360 2.5740 1.9800 1.8810 2.2320 2.0460 2.6640 2.6640 2.7750 1.9800 2.3760 3.6900 2.7060 2.5830 1.8900

ans =

1.0e+003 *

1.6500 2.1255 1.9470 2.2860 2.0400 1.9575

ans =

1.0e+003 *

1.6500 2.1450 1.9800 2.3400 2.1000 2.0250

ans =

1.0e+003 *

1.6500 2.1645 2.0130 2.3940

2.1000 3.7800 1.8000 1.9500 2.1255 1.9470 2.4780 2.6520 2.0955 2.7720 2.4480 3.8700 2.1750 3.9900 1.8000 1.9500 2.1450 1.9800 2.5200 2.7300 2.1450 2.8800 2.5200 4.0500 2.2500 4.2000 1.8000 1.9500 2.1645 2.0130 2.5620 2.8080 2.1945 2.9880 2.1600 1.6500 1.5930 2.0400 2.7720 2.8380 2.2800 1.6500 1.6200 2.1000 2.8800 2.9700 2.4000 1.6500 1.6470 2.1600 2.9880 14

3.6450 1.7250 2.0355 1.9380 2.8875 2.7090 3.8475 1.7250 2.0700 1.9950 3.0000 2.8350 4.0500 1.7250 2.1045 2.0520 3.1125

2.1600 2.5920 4.2300 3.1020 2.9610 2.0925 2.3250 4.4100 2.5200 4.2525

ans =

1.0e+003 *

1650 1800 1950 1650 1725 2184 2046 2448 2220 2160

ans =

1.0e+003 *

1.6500 2.2035 2.0790 2.5020 2.2800 2.2275

ans =

1.0e+003 *

1.6500 2.2230 2.1120 2.5560 2.3400 2.2950

ans =

1.0e+003 *

2184 2046 2604 2886 2244 3096 2664 4410 2400 4620 1.8000 1.9500 2.2035 2.0790 2.6460 2.9640 2.2935 3.2040 2.7360 4.5900 2.4750 4.8300 1.8000 1.9500 2.2230 2.1120 2.6880 3.0420 2.3430 3.3120 2.8080 4.7700 2.5500 5.0400 1674 2220 3096 3234 2640 1.6500 1.7010 2.2800 3.2040 3.3660 2.7600 1.6500 1.7280 2.3400 3.3120 3.4980 2.8800 15

2139 2109 3225 3087 4455 1.7250 2.1735 2.1660 3.3375 3.2130 4.6575 1.7250 2.2080 2.2230 3.4500 3.3390 4.8600

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