精品文档---下载后可任意编辑>> vpa('pi',20)ans =3.1415926535897932385>> vpa('exp(1)',20)ans =2.7182818284590452354>> x=linspace(-pi,pi,21);>> y=sin(x)y = Columns 1 through 6 -0.0000 -0.3090 -0.5878 -0.8090 -0.9511 -1.0000 Columns 7 through 12 -0.9511 -0.8090 -0.5878 -0.3090 0 0.3090 Columns 13 through 18 0.5878 0.8090 0.9511 1.0000 0.9511 0.8090 Columns 19 through 210.5878 0.3090 0.0000 >> 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 = 0.8147 0.1270 0.63240.9058 0.9134 0.0975>> x=a(1,:)x =0.8147 0.1270 0.6324>> y=a(2,:)y =0.9058 0.9134 0.0975>> norm(x)ans = 1.0391>> norm(y)ans =1.2900>> acos(dot(x,y)/norm(x)/norm(y))ans = 0.8189精品文档---下载后可任意编辑>> rand(3,3)ans = 0.2785 0.9649 0.9572 0.5469 0.1576 0.4854 0.9575 0.9706 0.8003>> det(ans)ans =0.2937线性无关a = 0.3922 0.7060 0.6555 0.0318 0.1712 0.2769>> x=a(1,:)x = 0.3922 0.7060>> y=a(2,:)y = 0.6555 0.0318>> z=a(3,:)z = 0.1712 0.2769>> alpha=x-zalpha = 0.2210 0.4291>> beta=y-zbeta =0.4843 -0.2451>> alpha=[alpha 0]alpha = 0.2210 0.4291 0>> beta=[beta 0]beta = 0.4843 -0.2451 0>> cross(alpha,beta)ans = 0 0 -0.2620面积 0.2620>> a=11:19;>> b=a;>> for k=1:8b=[b;a+10*k];end>> rank(b)ans = 2>> a=vander(1:9);>> b=fliplr(a)b = Columns 1 through 5 1 1 1 1 1 1 2 4 8 16 1 3 9 27 81 1 4 16 64 256 1 5 25 125 625 1 6 36 216 1296 1 7 49 343 2401 1 8 64 512 4096 1 9 81 729 6561 Columns 6 through 9 1 1 1 1 32 64 128 256 243 729 2187 6561 1024 4096 16384 65536 3125 15625 78125 390625 7776 46656 279936 1679616 16807 117649 823543 5764801 32768 262144 2097152 16777216 59049 531441 4782969 43046721精品文档---下载后可任意编辑>> det(b)ans = 5.0566e+15方式一>> f=@(x,y) exp(x+y)+sin((...
