数学建模与数学实验课程设计题目与参考答案

25.77 4.87 1.64 23.17 5.80 1.90 28.57 5.22 1.66 23.52 5.18 1.98 21.86 4.86 1.59 28.95 5.18 1.37 24.53 4.88 1.39 27.65 5.02 1.66 27.29 5.55 1.70 29.07 5.26 1.82 32.47 5.18 1.75 29.65 5.08 1.70 22.11 4.90 1.81 22.43 4.65 1.82 20.04 5.08 1.53]; x=[ones(25,1), x1]; y=[15.02 12.62 14.86 13.98 15.91 12.47 15.80 14.32 13.76 15.18 14.20 17.07 15.40 15.94 14.33 15.11 13.81 15.58 15.85 15.28 16.40 15.02 15.73 14.75 14.35];

[b,bint,r,rint,stats]=regress(y,x,0.05) rcoplot(r,rint) 结果

13

b =

0.8539 0.0178 2.0782 1.9396

bint =

-1.9995 3.7073 -0.0429 0.0784 1.5199 2.6365 0.8799 2.9993 r =

-0.0117 -0.2270 -0.7043 -0.0645 0.5420 -0.5628 -0.0424 0.4385 0.4483 -0.4225 -0.4134 0.0657 -0.0293 0.0628 -0.0962 0.3195 -0.3173 0.5827 -0.3200 -0.5517 0.8100 -0.2151 0.7895 0.3040 -0.3847 rint =

-0.7529 0.7296

14

-1.0834 0.6294 -1.5394 0.1307 -0.9901 0.8611 -0.2963 1.3802 -1.3877 0.2621 -0.9732 0.8883 -0.4515 1.3285 -0.4300 1.3266 -1.3338 0.4888 -1.3498 0.5230 -0.7458 0.8773 -0.9705 0.9118 -0.8073 0.9330 -1.0266 0.8341 -0.5428 1.1819 -1.2330 0.5984 -0.3303 1.4956 -1.2244 0.5845 -1.4402 0.3369 0.0281 1.5918 -1.1390 0.7087 -0.0365 1.6155 -0.5634 1.1714 -1.2544 0.4850 stats =

0.8436 37.7453 0.0000 0.2114

15

Residual Case Order Plot1.510.5slaudis0Re-0.5-1-1.5510152025Case Number

同理题一可知，剔除残差较大的数据。 剔除数据后

16

残差图