奖学金评定建模题(6)

x2=3:0.001:5; y2=c*log(x2)+d; x=[x1,x2]; y=[y1,y2]; x=double(x); y=double(y); plot(x,y)

二、用matlab求判断矩阵的特征值和特征向量的程序为：

m=[1 7 5 3 3;1/7 1 2 1/5 1/4;1/5 1/2 1 1/5 1/4;1/3 5 5 1 1/2;1/3 4 4 2 1]; [v,d]=eig(m)

三、求加权成绩的matlab程序：

a=[93.69587 98 0 0 81.25;91.68362 70 51 0 71.875;

84.95495 100 51 51 87.5;78.87295 50 52.5 0 62.5;78.92665 76 52.5 0 93.75;86.84109 100 0 54 75;82.92160 55 52.5 0 81.25; 86.27317 30 0 0 46.875;87.72830 95 51 51.5 43.75; 85.55245 100 0 0 53.125;83.63389 10 52.5 0 75; 89.36218 5 0 0 56.25;74.61203 10 0 0 37.5; 95.10127 100 51 52 90.625];

b=[0.4597;0.0619;0.0513;0.1948;0.2322]; c=a*b c =

68.0044 65.7856 78.1124 56.5586 65.4490 74.0450 63.0831 52.4012 69.0164 57.8541 59.1737 54.4505 43.6257 83.6971

14