rand(1,3) ans = 0.8147 0.9058 0.1270 rand(3,1) ans = 0.9134 0.6324 0.0975 a=rand(1,3) a = 0.2785 0.5469 0.9575 a a = 0.2785 0.5469 0.9575 a=rand(3,1); b=rand(3,1); a a = 0.9649 0.1576 0.9706 b b = 0.9572 0.4854 0.8003 a+b ans = 1.9221 0.6430 1.7709 c=a+b; c c = 1.9221 0.6430 1.7709 id=eye(3,3) id = 1 0 0 0 1 0 0 0 1 m=rand(3,3) m = 0.1419 0.7922 0.0357 0.4218 0.9595 0.8491 0.9157 0.6557 0.9340 m+id ans = 1.1419 0.7922 0.0357 0.4218 1.9595 0.8491 0.9157 0.6557 1.9340 ones(5,5) ans = 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 a=ans+eye(5) a = 2 1 1 1 1 1 2 1 1 1 1 1 2 1 1 1 1 1 2 1 1 1 1 1 2 s=a(1:4,2:3) s = 1 1 2 1 1 2 1 1 a a = 2 1 1 1 1 1 2 1 1 1 1 1 2 1 1 1 1 1 2 1 1 1 1 1 2 sum(a,1) ans = 6 6 6 6 6 sum(a,2) ans = 6 6 6 6 6 2+2; ans ans = 4 for i=1:10 q(i)=i; end q q = 1 2 3 4 5 6 7 8 9 10 p=1:10 p = 1 2 3 4 5 6 7 8 9 10 d=rand(8,8) d = Columns 1 through 7 0.6787 0.2769 0.4387 0.7094 0.9597 0.8909 0.8143 0.7577 0.0462 0.3816 0.7547 0.3404 0.9593 0.2435 0.7431 0.0971 0.7655 0.2760 0.5853 0.5472 0.9293 0.3922 0.8235 0.7952 0.6797 0.2238 0.1386 0.3500 0.6555 0.6948 0.1869 0.6551 0.7513 0.1493 0.1966 0.1712 0.3171 0.4898 0.1626 0.2551 0.2575 0.2511 0.7060 0.9502 0.4456 0.1190 0.5060 0.8407 0.6160 0.0318 0.0344 0.6463 0.4984 0.6991 0.2543 0.4733 Column 8 0.3517 0.8308 0.5853 0.5497 0.9172 0.2858 0.7572 0.7537 d=rand(7,7) d = 0.3804 0.1299 0.3112 0.7482 0.5383 0.7749 0.4314 0.5678 0.5688 0.5285 0.4505 0.9961 0.8173 0.9106 0.0759 0.4694 0.1656 0.0838 0.0782 0.8687 0.1818 0.0540 0.0119 0.6020 0.2290 0.4427 0.0844 0.2638 0.5308 0.3371 0.2630 0.9133 0.1067 0.3998 0.1455 0.7792 0.1622 0.6541 0.1524 0.9619 0.2599 0.1361 0.9340 0.7943 0.6892 0.8258 0.0046 0.8001 0.8693 e=rand(7,1) e = 0.5797 0.5499 0.1450 0.8530 0.6221 0.3510 0.5132 for i=1:7 d(:,i)=d(:,i)+e; end r=repmat(e,[1 7]) r = 0.5797 0.5797 0.5797 0.5797 0.5797 0.5797 0.5797 0.5499 0.5499 0.5499 0.5499 0.5499 0.5499 0.5499 0.1450 0.1450 0.1450 0.1450 0.1450 0.1450 0.1450 0.8530 0.8530 0.8530 0.8530 0.8530 0.8530 0.8530 0.6221 0.6221 0.6221 0.6221 0.6221 0.6221 0.6221 0.3510 0.3510 0.3510 0.3510 0.3510 0.3510 0.3510 0.5132 0.5132 0.5132 0.5132 0.5132 0.5132 0.5132 d=d+e {Error using + Matrix dimensions must agree. } d=d+r d = 1.5399 1.2893 1.4706 1.9076 1.6978 1.9343 1.5908 1.6675 1.6685 1.6283 1.5503 2.0959 1.9170 2.0104 0.3658 0.7593 0.4556 0.3737 0.3681 1.1586 0.4718 1.7600 1.7180 2.3080 1.9350 2.1487 1.7905 1.9699 1.7749 1.5812 1.5071 2.1574 1.3508 1.6439 1.3896 1.4811 0.8641 1.3560 0.8543 1.6638 0.9618 0.8380 1.9605 1.8208 1.7157 1.8523 1.0311 1.8266 1.8958 a=rand(10,10); imagesc(a) colormap(gray) pwd ans = /Users/elm/Desktop/Teaching/Data cd .. cd Images/ ls 11brain2axx__1231575167_0544.jpg Prokudin diary eye_closeup.pdf eye_closeup2.pdf face-in-beans.jpg float.tiff flower.tiff mms.jpg im=imread('mms.jpg'); imagesc(im) impixelinfo diary off;