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1、1.(1)A=randn(10,5) A = -0.4326 -0.1867 0.2944 -0.3999 -1.6041 -1.6656 0.7258 -1.3362 0.6900 0.2573 0.1253 -0.5883 0.7143 0.8156 -1.0565 0.2877 2.1832 1.6236 0.7119 1.4151 -1.1465 -0.1364 -0.6918 1.2902 -0.8051 1.1909 0.1139 0.8580 0.6686 0.5287 1.1892 1.0668 1.2540 1.1908 0.2193 -0.0376 0.0593 -1.59
2、37 -1.2025 -0.9219 0.3273 -0.0956 -1.4410 -0.0198 -2.1707 0.1746 -0.8323 0.5711 -0.1567 -0.0592 B=mean(A) B = 0.0013 0.2310 0.0253 0.3588 -0.4197 C=std(A) C = 0.9034 0.8829 1.1898 0.7832 1.0821 (2)D=max(max(A) D = 2.1832 E=min(min(A) E = -2.1707 (3)F=sum(A,2) F = -2.3288 -1.3287 0.0105 6.2215 -1.489
3、5 3.3602 4.9201 -3.6964 -3.3998 -0.3025 G=sum(sum(A) G = 1.9666 (4)H=sort(A) H = -1.6656 -0.8323 -1.5937 -1.2025 -2.1707 -1.1465 -0.5883 -1.4410 -0.3999 -1.6041 -0.4326 -0.1867 -1.3362 -0.1567 -1.0565 -0.0376 -0.1364 -0.6918 -0.0198 -0.9219 0.1253 -0.0956 0.2944 0.6686 -0.8051 0.1746 0.0593 0.5711 0
4、.6900 -0.0592 0.2877 0.1139 0.7143 0.7119 0.2193 0.3273 0.7258 0.8580 0.8156 0.2573 1.1892 1.0668 1.2540 1.1908 0.5287 1.1909 2.1832 1.6236 1.2902 1.4151 L=-sort(-A,2,descend) L = -1.6041 -0.4326 -0.3999 -0.1867 0.2944 -1.6656 -1.3362 0.2573 0.6900 0.7258 -1.0565 -0.5883 0.1253 0.7143 0.8156 0.2877
5、0.7119 1.4151 1.6236 2.1832 -1.1465 -0.8051 -0.6918 -0.1364 1.2902 0.1139 0.5287 0.6686 0.8580 1.1909 0.2193 1.0668 1.1892 1.1908 1.2540 -1.5937 -1.2025 -0.9219 -0.0376 0.0593 -2.1707 -1.4410 -0.0956 -0.0198 0.3273 -0.8323 -0.1567 -0.0592 0.1746 0.5711 2.(1)x=0 15 30 45 60 75 90;y=0 0.2588 0.5000 0.
6、7071 0.8660 0.9659 1.0000;x1=0:90;y1=interp1(x,y,x1,spline) y1 = Columns 1 through 11 0 0.0175 0.0349 0.0524 0.0698 0.0872 0.1045 0.1219 0.1392 0.1564 0.1737 Columns 12 through 22 0.1908 0.2079 0.2249 0.2419 0.2588 0.2756 0.2923 0.3090 0.3255 0.3420 0.3583 Columns 23 through 33 0.3746 0.3907 0.4067
7、0.4226 0.4384 0.4540 0.4695 0.4848 0.5000 0.5150 0.5299 Columns 34 through 44 0.5446 0.5592 0.5736 0.5878 0.6018 0.6157 0.6293 0.6428 0.6561 0.6691 0.6820 Columns 45 through 55 0.6947 0.7071 0.7193 0.7313 0.7431 0.7547 0.7660 0.7771 0.7880 0.7986 0.8090 Columns 56 through 66 0.8191 0.8290 0.8387 0.8
8、480 0.8571 0.8660 0.8746 0.8829 0.8910 0.8987 0.9062 Columns 67 through 77 0.9135 0.9204 0.9271 0.9335 0.9396 0.9454 0.9510 0.9563 0.9612 0.9659 0.9703 Columns 78 through 88 0.9744 0.9782 0.9817 0.9849 0.9878 0.9904 0.9927 0.9946 0.9963 0.9977 0.9987 Columns 89 through 91 0.9995 0.9999 1.0000 x=0 15
9、 30 45 60 75;y=0 0.2679 0.5774 1.0000 1.7320 3.7320;x1=0:75;y1=interp1(x,y,x1,spline) y1 = Columns 1 through 11 0 0.0184 0.0365 0.0545 0.0724 0.0902 0.1079 0.1255 0.1431 0.1607 0.1784 Columns 12 through 22 0.1961 0.2138 0.2317 0.2497 0.2679 0.2863 0.3048 0.3236 0.3427 0.3620 0.3817 Columns 23 throug
10、h 33 0.4017 0.4221 0.4429 0.4641 0.4858 0.5079 0.5305 0.5537 0.5774 0.6017 0.6266 Columns 34 through 44 0.6520 0.6780 0.7046 0.7317 0.7593 0.7876 0.8163 0.8456 0.8754 0.9058 0.9367 Columns 45 through 55 0.9681 1.0000 1.0325 1.0658 1.1003 1.1364 1.1743 1.2145 1.2572 1.3028 1.3516 Columns 56 through 6
11、6 1.4041 1.4604 1.5211 1.5863 1.6565 1.7320 1.8131 1.9002 1.9936 2.0937 2.2008 Columns 67 through 76 2.3152 2.4374 2.5675 2.7060 2.8532 3.0095 3.1752 3.3506 3.5361 3.7320 x=0 15 30 45 60 75 90;y=0 0.2588 0.5000 0.7071 0.8660 0.9659 1.0000;y1=polyfit(x,y,5) y1 = 0.0000 0.0000 -0.0000 0.0000 0.0174 0.
12、0000 x=0 15 30 45 60 75;y=0 0.2679 0.5774 1.0000 1.7320 3.7320;y1=polyfit(x,y,5) y1 = 0.0000 -0.0000 0.0000 -0.0010 0.0245 0.0000 (2)x=1 4 9 16 25 36 49 64 81 100;y=1:10;x1=1:100;y1=interp1(x,y,x1,cubic) y1 = Columns 1 through 11 1.0000 1.3729 1.7125 2.0000 2.2405 2.4551 2.6494 2.8292 3.0000 3.1636 3.3186 Co
