## 7 Рассматриваем базовые операции с матрицами. Формирование матрицы из вектора C. Количество строк – результат деления длины вектора на заданное количество столбцов матрицы. ```matlab >> D=reshape(C,[],6) D = 4 8 12 16 20 24 5 9 13 17 21 25 6 10 14 18 22 26 7 11 15 19 23 27 ``` >> E=B'*A E = 0.488550 0.011549 1.000897 2.699564 -0.504726 1.819611 -0.151361 0.254209 0.624697 1.512441 0.183915 0.725667 0.072425 0.313477 1.110223 2.959277 0.309335 1.753866 0.333663 0.135882 1.735861 4.354475 -0.273429 1.707147 0.038203 0.340325 1.835803 4.116933 -1.331504 2.154751 -0.258805 0.328323 0.793725 1.274550 -1.792678 1.396500 -0.015348 0.371355 1.553848 3.350191 -1.666793 2.328455 >> F=[A,B] F = Columns 1 through 8: 1.148943 -0.660449 0.505361 2.144800 0.874353 -0.061676 0.831759 0.168296 0.073393 -0.083308 1.300502 1.839412 -3.915271 0.771531 0.413143 0.094149 -0.439376 0.422486 0.877189 2.021633 0.628780 0.429597 0.288750 0.547413 -0.485810 0.620539 -0.275356 -0.561242 0.267499 1.872348 0.762738 0.228719 Columns 9 through 13: 0.632518 0.858376 0.634046 0.031583 0.540918 0.232844 0.454478 0.678126 0.535694 0.709084 0.770984 0.976534 0.934923 0.240303 0.664854 0.684711 0.528709 0.677770 0.471018 0.816684 >> G=A.*D G = 4.5958 -5.2836 6.0643 34.3168 17.4871 -1.4802 0.3670 -0.7498 16.9065 31.2700 -82.2207 19.2883 -2.6363 4.2249 12.2806 36.3894 13.8332 11.1695 -3.4007 6.8259 -4.1303 -10.6636 6.1525 50.5534 M=G./4.5 M = 1.0213e+00 -1.1741e+00 1.3476e+00 7.6260e+00 3.8860e+00 -3.2894e-01 8.1547e-02 -1.6662e-01 3.7570e+00 6.9489e+00 -1.8271e+01 4.2863e+00 -5.8583e-01 9.3886e-01 2.7290e+00 8.0865e+00 3.0740e+00 2.4821e+00 -7.5570e-01 1.5169e+00 -9.1785e-01 -2.3697e+00 1.3672e+00 1.1234e+01 >> M=G./4.5 M = 1.0213e+00 -1.1741e+00 1.3476e+00 7.6260e+00 3.8860e+00 -3.2894e-01 8.1547e-02 -1.6662e-01 3.7570e+00 6.9489e+00 -1.8271e+01 4.2863e+00 -5.8583e-01 9.3886e-01 2.7290e+00 8.0865e+00 3.0740e+00 2.4821e+00 -7.5570e-01 1.5169e+00 -9.1785e-01 -2.3697e+00 1.3672e+00 1.1234e+01 >> DDD=D.^3 DDD = 64 512 1728 4096 8000 13824 125 729 2197 4913 9261 15625 216 1000 2744 5832 10648 17576 343 1331 3375 6859 12167 19683 >> DL=D>=20 DL = 0 0 0 0 1 1 0 0 0 0 1 1 0 0 0 0 1 1 0 0 0 0 1 1 >> Dstolb=D(:) Dstolb = 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 NOMER 8 >> B1=sqrt(B) B1 = Columns 1 through 5: 0.9120 0.4102 0.7953 0.9265 0.7963 0.6428 0.3068 0.4825 0.6742 0.8235 0.5374 0.7399 0.8781 0.9882 0.9669 0.8733 0.4782 0.8275 0.7271 0.8233 Columns 6 and 7: 0.1777 0.7355 0.7319 0.8421 0.4902 0.8154 0.6863 0.9037 >> B2=log(B) B2 = Columns 1 through 4: -0.184212 -1.782031 -0.458047 -0.152714 -0.883960 -2.362875 -1.457387 -0.788605 -1.242194 -0.602552 -0.260088 -0.023746 -0.270841 -1.475262 -0.378758 -0.637316 Columns 5 through 7: -0.455633 -3.455126 -0.614488 -0.388422 -0.624192 -0.343782 -0.067292 -1.425857 -0.408188 -0.388948 -0.752859 -0.202503 >> B3=sin(B) B3 = Columns 1 through 4: 0.739117 0.167503 0.591177 0.756782 0.401490 0.094010 0.230746 0.438994 0.284754 0.520480 0.696841 0.828562 0.690903 0.226730 0.632450 0.504419 Columns 5 through 7: 0.592410 0.031578 0.514923 0.627335 0.510438 0.651139 0.804553 0.237996 0.616944 0.627057 0.453794 0.728880 --------------------------------------- >> k=length(B1) k = 7 >> nm=size(B1) nm = 4 7 >> elem=numel(B1) elem = 28 >> NN=linspace(11.5,34.1,20) NN = Columns 1 through 8: 11.500 12.689 13.879 15.068 16.258 17.447 18.637 19.826 Columns 9 through 16: 21.016 22.205 23.395 24.584 25.774 26.963 28.153 29.342 Columns 17 through 20: 30.532 31.721 32.911 34.100 >> FF=ones(2,4) FF = 1 1 1 1 1 1 1 1 >> GG=zeros(5) GG = 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 >> B1D=diag(B1) B1D = 0.9120 0.3068 0.8781 0.7271 >> DB=diag(B1D) DB = Diagonal Matrix 0.9120 0 0 0 0 0.3068 0 0 0 0 0.8781 0 0 0 0 0.7271 >> BS1=sort(B) BS1 = 0.288750 0.094149 0.232844 0.454478 0.634046 0.031583 0.540918 0.413143 0.168296 0.632518 0.528709 0.677770 0.240303 0.664854 0.762738 0.228719 0.684711 0.858376 0.678126 0.471018 0.709084 0.831759 0.547413 0.770984 0.976534 0.934923 0.535694 0.816684 >> BS2=sortrows(B,2) BS2 = 0.413143 0.094149 0.232844 0.454478 0.678126 0.535694 0.709084 0.831759 0.168296 0.632518 0.858376 0.634046 0.031583 0.540918 0.762738 0.228719 0.684711 0.528709 0.677770 0.471018 0.816684 0.288750 0.547413 0.770984 0.976534 0.934923 0.240303 0.664854 >> DS1=sum(D) DS1 = 22 38 54 70 86 102 >> DS2=sum(D,2) DS2 = 84 90 96 102 >> DP1=prod(D) DP1 = 840 7920 32760 93024 212520 421200 >> dt=det(A*A') dt = 1388.8 >> dinv=inv(A*A') dinv = 0.374568 0.025819 -0.305610 0.189828 0.025819 0.053005 -0.044695 0.025517 -0.305610 -0.044695 0.432459 -0.163317 0.189828 0.025517 -0.163317 0.317169