南华大学MATLAB实验报告1

44 A13 = 12 23 34 A14 = 21 32 43 A15 = 13 24

2、在命令窗口输入代码如下： A=[2 3 -5 4;-1 2 7 -3;5 -4 2 1;7 6 -2 -3]; inv(A) ans =

0.0198 0.0010 0.1069 0.0610 0.1199 0.1116 -0.0636 0.0271 0.0709 0.1616 0.0667 -0.0448 0.2388 0.1178 0.0777 -0.1069 det(A)

ans = -1918 trace(A) ans = 3 E=eig(A) E =

-5.6545 4.6888 1.9828 + 8.2711i 1.9828 - 8.2711i [V,D]=eig(A) V =

0.3850 0.4655 -0.0889 + 0.4794i -0.0889 - 0.4794i

-0.1196 0.4083 -0.1447 - 0.5624i -0.1447 + 0.5624i

-0.1972 0.4872 0.5903 0.5903

-0.8936 0.6157 -0.1444 + 0.2359i -0.1444 - 0.2359i D =

-5.6545 0 0 0

0 4.6888 0 0

0 0 1.9828 + 8.2711i 0

0 0 0 1.9828 - 8.2711i

3、在命令窗口键入实验代码如下： >> A=magic(3),B=7*rand(3) A =

8 1 6 3 5 7 4 9 2 B =

6.6509 3.4019 3.1953 1.6180 6.2391 0.1295 4.2479 5.3347 5.7499 >> A*B ans =

80.3126 65.4622 60.1908

57.7778 78.7438 50.4824 49.6611 80.4287 25.4465 >> A&B ans =

1 1 1 1 1 1 1 1 1 >> A|B ans =

1 1 1 1 1 1 1 1 1 >> ~A ans =

0 0 0 0 0 0 0 0 0 >> A==B ans =

0 0 0 0 0 0 0 0 0