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1、.*>>vpa('pi',20)ans=3.1415926535897932385>>vpa('exp(1)',20)ans=2.7182818284590452354>>x=linspace(-pi,pi,21);>>y=sin(x)y=Columns1through6-0.0000-0.3090-0.5878-0.8090-0.9511-1.0000Columns7through12-0.9511-0.8090-0.5878-0.309000.3090Columns13through180.58780.80900.95111.00000.95110.8090Colum
2、ns19through210.58780.30900.0000å->>k=1:1000;>>kk=1./k;>>kkk=kk./k;>>res=sum(kkk)-(pi^2)/6res=.*-9.9950e-04%承接上题>>sum(kk)-log(1000)ans=0.5777>>power(1+eps,1/eps)ans=2.7183>>a=rand(2,3)a=.*0.81470.12700.63240.90580.91340.0975>>x=a(1,:)x=0.81470.12700.6324>>y=a(2,:)y=0.90580.91340.0975>>norm
3、(x)ans=1.0391>>norm(y)ans=1.2900>>acos(dot(x,y)/norm(x)/norm(y))ans=0.8189>>rand(3,3)ans=0.27850.96490.95720.54690.15760.48540.95750.97060.8003>>det(ans)ans=.*0.2937线性无关a=0.39220.70600.65550.03180.17120.2769>>x=a(1,:)x=0.39220.7060>>y=a(2,:)y=0.65550.0318>>z=a(3,:)z=0.17120.2769>>alpha=x-
4、zalpha=0.22100.4291>>beta=y-zbeta=0.4843-0.2451>>alpha=[alpha0]alpha=0.22100.42910.*>>beta=[beta0]beta=0.4843-0.24510>>cross(alpha,beta)ans=00-0.2620面积0.2620>>a=11:19;>>b=a;>>fork=1:8b=[b;a+10*k];end>>rank(b)ans=2>>a=vander(1:9);>>b=fliplr(a)b=Columns1through511111.*1248161392781141664256
5、152512562516362161296174934324011864512409619817296561Columns6through911113264128256243729218765611024409616384655363125156257812539062577764665627993616796161680711764982354357648013276826214420971521677721659049531441478296943046721>>det(b)ans=5.0566e+15方式一>>f=@(x,y)exp(x+y)+sin((x^2)+(
6、y^2))f=@(x,y)exp(x+y)+sin((x^2)+(y^2))>>f(1,2)ans=19.1266方式二functionf=myfunfun(x,y)f=exp(x+y)+sin((x^2)+(y^2));.*>>myfunfun(1,2)ans=19.1266>>Char1.4142135623730950488016887242096980785696718753769480731766797379907324784621070388503875343276415727>>a=ans；>>sqrt2char(3-2)=a(3)sqrt2char=414
7、2135623730950488016887242096980785696718753769480731766797379907324784621070388503875343276415727>>forx=1:100b(x)=str2num(sqrt2char(x))end>>sum(b)/100ans=4.8100.*f=@(x)(x^3)*sin(x)+(x^2)/3+x*cos(x)f=@(x)(x^3)*sin(x)+(x^2)/3+x*cos(x)>>ezplot(f,-2,1)>>x0=fzero(f,-1)x0
