matlab数学实验 第八章~第十章部分习题答案.doc

第八章exercize 2x=480 500 380 1100 1100 490 230 250 300 510 1300; y=180 150 170 350 460 240 60 90 110 250 200; plot(x,y,*) c=corrcoef(x,y)；exercize 7(1)a=1/sqrt(2*pi)% 被积函数的最大值a = 0.3989n=10000;x=rand(n,1);y=unifrnd(0,0.4,n,1);c1=y0;c2=y nc=sum(c1&c2)nc = 8534 i=nc*0.4/ni = 0.34147(3)n=60000;y=rand(n,1);x=unifrnd(0,pi,n,1);z=rand(n,1);c1=ysin(x);c2=zx=linspace(0,2*pi,10); y=sin(x); xi=linspace(0,2*pi,50);yi=sin(xi); yi1=interp1(x,y,xi); yi2=interp1(x,y,xi,spline); plot(xi,yi1,r,xi,yi2,b,x,y,*)e1=norm(yi1-yi),e2=norm(yi2-yi) %均方误差e1 = 0.3097e2 = 0.0158exercize 3(4)x=linspace(-2,2,10);y=exp(-x.2); xi=linspace(-2,2,80); yi1=interp1(x,y,xi);yi2=interp1(x,y,xi,spline); yi=exp(-xi.2); plot(xi,yi1,r,xi,yi2,g,x,y,*) e1=norm(yi1-yi),e2=norm(yi2-yi)e1 = 0.1518e2 = 0.0069exercize 12y=100 75 80 70 50 65 90 100 110 60; x1=1000 600 1200 500 300 400 1300 1100 1300 300; x2=5 7 6 6 8 7 5 4 3 9; plot(x1,y,*) plot(x2,y,o) b,bint,r,rint,stats=regress(y,ones(10,1),x1,x2);bb = 111.6918 0.0143 -7.1882y0=b(1)+b(2)*1000+b(3)*6y0 = 82.8594第十章exercize 2f=5;4;8;A=2 -1 0;5 3 0;b=4;15; Aeq=1 2 1;Beq=6;lb=zeros(3,1);x,feval=linprog(f,A,b,Aeq,Beq,lb)Optimization terminated.x = 0.0000 3.0000 0.0000feval = 12.0000exercize 4f=-30;-40;A=20 100;40 80;90 60; b=200;200;360; x,feval=linprog(f,A,b,0;0)Optimization terminated.x = 3.5000 0.7500feval = -135.0000exercize 12%目标函数 fmb.mfunction f=fmb(x)f=-x(1)*x(2)*x(3);A=1 -2 -2;1 2 2;b=0;72;lb=-inf;10;-inf;ub=inf;20;inf;Aeq=1 -1 0;Beq=10;x,feval=fmincon(f