matlab及在電子信息類(lèi)課程中的應(yīng)用習(xí)題答案電子科大第二版(編輯修改稿)
2025-07-16 14:18 本頁(yè)面
【文章內(nèi)容簡(jiǎn)介】 ,y)ypie=x.^2./yx.*cos(y)。[x,y]=ode45(39。fun139。,[0,5],1)plot(x,y)function y=fun2(x)y=x.^43*x^3+5*cos(x)+8。fplot(39。fun239。,[1,5])hold on。x=0:5。y=0*x。plot(x,y)a=fzero(@fun2,2)b=fzero(@fun2,3)a=[2 4 9。4 2 4。9 4 18]。[v,gama]=eig(a)function xpie=fun3(t,x)f=exp(t)xpie=[0 1 0 0。1 0 0 1。0 0 0 1。0 1 1 0]*x+[0。1。0。0]*f[t,x]=ode45(39。fun339。,[0,5],[0 0 0 0]39。)。plot(t,x(:,1),39。b39。,t,x(:,3),39。r39。)function f=fun4(x,y)f=4*(xy)x.^2y.^2。v=2::2。[x,y]=meshgrid(v)z=fun4(x,y)。surf(x,y,z)求極小值 （有誤）function f=fun5(x,y)x=v(1)。y=v(2)f=(4*(xy)x.^2y.^2)。v=50:2:50。[x,y]=meshgrid(v)z=fun4(x,y)。surf(x,y,z)min=fminsearch(39。fun439。,[0,0])1function f=fun6(x,y)f=sin(y)+exp(x)x.*y.^2ezplot(39。fun639。)1function f=fun7(x,y)f=(xy).^2.*(sin(x+y)).^2 s=dblquad(39。fun739。,pi,2*pi,0,pi)1a=randn(4,4)[l,u]=lu(a)a=randn(4,4)[u,gama,v]=svd(a)1b=[3 4]。a=[3 4 5 6]。[r,p,k]=residue(b,a)b=[3 4]。a=[3 4 5 6]。[r,p,k]=residue(b,a)t=0::100。y=0*t。for i=1:3 y=y+r(i)*exp(p(i)*t)endplot(t,y)b=[3 4]。a=[3 4 5 6]。impulse(b,a)
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