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