>> D=B' D =
-1 -9 0 0 0 4 0 -23
>> A*B ans =
1.0000 -184.0000 -27.0000 -266.9000 0 46.0000 207.0000 69.0000
>> C 0 0 1 1 0 0 >> C&D ans = 1 0 0 0 1 0 >> C|D ans = 1 1 1 1 1 0 >> ~C|~D ans = 0 1 1 1 0 1 0 0 0 1 1 1 1 0 6 013矩阵运算练习： A=[8 9 5;36 -7 11;21 -8 5] A = 8 9 5 36 -7 11 21 -8 5 >> B B = -1 3 2 0 -3 1 >> RT=A*B RT = -5 29 -83 119 -52 68 >> QW=A.*B QW = -8 27 72 0 -63 -8 >> ER=A^3 ER = 6272 15714 8142 >> BF=A.^3 BF = -2 3 9 56 6 -21 -10 33 45 3342 -856 -1906 2944 5260 2390 7 512 729 125 46656 -343 1331 9261 -512 125 >> A/B ans = 3.1341 4.9634 -0.4024 -1.2561 12.5244 -3.2317 -1.9878 6.4512 -2.0366 >> EKV=B\\A EKV = 10.7195 -1.2683 3.5244 9.4756 1.5854 3.7195 4.8537 -1.4878 1.3171 >> KDK=[A,B] KDK = 8 9 5 -1 3 36 -7 11 2 0 21 -8 5 -3 1 >> ERI=[A;B] ERI = 8 9 5 36 -7 11 21 -8 5 -1 3 -2 2 0 3 -3 1 9 014一般函数的调用： A=[2 34 88 390 848 939]; -2 3 9 8 >> S=sum(A) S = 2301 >> min(A) ans = 2 >> EE=mean(A) EE = 383.5000 >> QQ=std(A) QQ = 419.3794 >> AO=sort(A) AO = 2 34 >> yr=norm(A) yr = 1.3273e+003 >> RT=prod(A) RT = 1.8583e+012 >> gradient(A) 88 390 848 939 9 ans = 32.0000 43.0000 178.0000 380.0000 274.5000 91.0000 >> max(A) ans = 939 >> median(A) ans = 239 >> diff(A) ans = 32 54 >> length(A) ans = 6 >> sum(A) ans = 2301 >> cov(A) ans = 1.7588e+005 >> 015矩阵变换：302 458 91 10