matlab程序設(shè)計(jì)教程第二版資料課后答案(編輯修改稿)
2025-07-21 18:59 本頁(yè)面
【文章內(nèi)容簡(jiǎn)介】 polyval(P1,e)T2=polyval(P2,e)（2）n=[1,9,16,25,36,49,64,81,100]。N=sqrt(n)。x=input(39。ji suan zhi : 39。)。interp1(n,N,x,39。cubic39。)3N=64。T=5。t=linspace(0,T,N)。h=exp(t)。dt=t(2)t(1)。f=1/dt。X=fft(t)。F=X(1:N/2+1)。f=f*(0:N/2)/N。plot(f,abs(F),39。*39。)4P=[2,3,0,5,13]。Q=[1,5,8]。p=polyder(P)q=polyder(P,Q)[a,b]=polyder(P,Q)5P1=[1,2,4,0,5]。P2=[0,1,2]。P3=[1,2,3]。P=P1+conv(P2,P3)X=roots(P)A=[1,。,2,。0,5,]。p=polyval(P,A)思考練習(xí)4A=rand(1,30000)。a=mean(A)b=std(A)Max=max(A)Min=min(A)n=0。for i=1:30000 if(A(i)) n=n+1。 endendny=n/300005p=[45,74,54,55,14。78,98,45,74,12。87,98,85,52,65][M,S]=max(p)[N,H]=min(p)junzhi=mean(p,1)fangcha=std(p,1,1)zong=sum(p,2)。[Max,wei]=max(zong)[Min,wei]=min(zong)[zcj,xsxh]=sort(zong,39。descend39。)6x=[1:10:101]。y=[0,,,]。[p,s]=polyfit(x,y,5)a=1:5:101。y1=polyval(p,a)。plot(x,y,39。:o39。,a,y1,39。*39。)unit6實(shí)驗(yàn)指導(dǎo)1A=[1/2,1/3,1/4。1/3,1/4,1/5。1/4,1/5,1/6]。p=[,]39。x=A\pA=[1/2,1/3,1/4。1/3,1/4,1/5。1/4,1/5,1/6]。p=[,]39。x=A\pcond(A)2（1）x1=fzero(@funx1,1)function fx=funx1(x)fx=x^41+x^3+1。（2）x2=fzero(@funx2,)function fx=funx2(x)fx=xsin(x)/x。（3）options=optimset(39。Display39。,39。off39。)。x=fsolve(@fun3,[1,1,1]39。,options)q=fun3(x)function q=fun3(p)x=p(1)。y=p(2)。z=p(3)。q(1)=sin(x)+y^2+log(z)7。q(2)=3*x+2^yz^3+1。q(3)=x+y+z5。3（1）t0=0。tf=5。y0=1。[t,y]=ode23(@fun4,[t0,tf],y0)。t39。y39。function yp=fun4(t,y)yp=(+sin(10*t))*y。（2）t0=0。tf=5。y0=1。[t,y]=ode23(@fun5,[t0,tf],y0)。t39。y39。function yp=fun5(t,y)yp=cos(t)y/(1+t^2)。4x=fminbnd(@mymin,0,2)。mymin(x)function fx=mymin(x)fx=(1+x.^2)/(1+x.^4)。5options=optimset(39。Display39。,39。off39。)。[x,fval]=fmincon(@fun6,[0,0,0],[],[],a,b,lb,ub)fvalfunction f=fun6(x)f=(sqrt(x(1))+(400x(1))*+(sqrt(x(2))+(400x(1))*(2))*+sqrt(3)+(((400x(1))*(2))*(3))*+sqrt(x(x4)))。思考練習(xí)1（1）A=[2,3,5。3,7,4。1,7,1]。B=[10,3,5]39。C1=inv(A)*BC2=A\B[L,U]=lu(A)。x=U\(L\B)（2）A=[6,5,2,5。9,1,4,1。3,4,2,2。3,9,0,2]。B=[4,13,1,11]39。C1=inv(A)*BC2=A\B[L,U]=lu(A)。x=U\(
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