x=[1 2 3;3 5 6;8 7 2]; x x = 1 2 3 3 5 6 8 7 2 x(2,2) ans = 5 format compact x(1,:) ans = 1 2 3 x(:,2) ans = 2 5 7 y=1:10 y = 1 2 3 4 5 6 7 8 9 10 z=linspace(0,1,5) z = 0 0.2500 0.5000 0.7500 1.0000 y' ans = 1 2 3 4 5 6 7 8 9 10 y=1:5 y = 1 2 3 4 5 y' ans = 1 2 3 4 5 y+2 ans = 3 4 5 6 7 y*3 ans = 3 6 9 12 15 y.^2 ans = 1 4 9 16 25 x=[2 3 4 5 6]; x*y ??? Error using ==> * Inner matrix dimensions must agree. x*y' ans = 70 x'*y ans = 2 4 6 8 10 3 6 9 12 15 4 8 12 16 20 5 10 15 20 25 6 12 18 24 30 sum(y) ans = 15 mean(y) ans = 3 median(y) ans = 3 std(y) ans = 1.5811 sort(y) ans = 1 2 3 4 5 % how do I write comments? % I guess that works x=linspace(-3,3,100); y=exp(-x.^2/2); plot(x,y,'b') plot(x,y,'--g') plot(x,y,'o') help plot PLOT Linear plot. PLOT(X,Y) plots vector Y versus vector X. If X or Y is a matrix, then the vector is plotted versus the rows or columns of the matrix, whichever line up. PLOT(Y) plots the columns of Y versus their index. If Y is complex, PLOT(Y) is equivalent to PLOT(real(Y),imag(Y)). In all other uses of PLOT, the imaginary part is ignored. Various line types, plot symbols and colors may be obtained with PLOT(X,Y,S) where S is a character string made from one element from any or all the following 3 colunms: y yellow . point - solid m magenta o circle : dotted c cyan x x-mark -. dashdot r red + plus -- dashed g green * star b blue s square w white d diamond k black v triangle (down) ^ triangle (up) < triangle (left) > triangle (right) p pentagram h hexagram For example, PLOT(X,Y,'c+:') plots a cyan dotted line with a plus at each data point; PLOT(X,Y,'bd') plots blue diamond at each data point but does not draw any line. PLOT(X1,Y1,S1,X2,Y2,S2,X3,Y3,S3,...) combines the plots defined by the (X,Y,S) triples, where the X's and Y's are vectors or matrices and the S's are strings. For example, PLOT(X,Y,'y-',X,Y,'go') plots the data twice, with a solid yellow line interpolating green circles at the data points. The PLOT command, if no color is specified, makes automatic use of the colors specified by the axes ColorOrder property. The default ColorOrder is listed in the table above for color systems where the default is yellow for one line, and for multiple lines, to cycle through the first six colors in the table. For monochrome systems, PLOT cycles over the axes LineStyleOrder property. PLOT returns a column vector of handles to LINE objects, one handle per line. The X,Y pairs, or X,Y,S triples, can be followed by parameter/value pairs to specify additional properties of the lines. See also SEMILOGX, SEMILOGY, LOGLOG, GRID, CLF, CLC, TITLE, XLABEL, YLABEL, AXIS, AXES, HOLD, COLORDEF, and SUBPLOT. x=rand(1000,1); hist(x,.05:.1:.95) mean(x) ans = 0.5021 std(x) ans = 0.2893 sqrt(1/12) ans = 0.2887 sum(x<.4)/1000 ans = 0.3940 z=randn(1000,1); hist(z) z z = -0.4326 -1.6656 0.1253 0.2877 -1.1465 1.1909 1.1892 -0.0376 0.3273 0.1746 -0.1867 0.7258 -0.5883 2.1832 -0.1364 0.1139 1.0668 0.0593 -0.0956 -0.8323 0.2944 -1.3362 0.7143 1.6236 -0.6918 0.8580 1.2540 -1.5937 -1.4410 0.5711 -0.3999 0.6900 0.8156 0.7119 1.2902 0.6686 1.1908 -1.2025 -0.0198 -0.1567 -1.6041 0.2573 -1.0565 1.4151 -0.8051 0.5287 0.2193 -0.9219 -2.1707 -0.0592 -1.0106 0.6145 0.5077 1.6924 0.5913 -0.6436 0.3803 -1.0091 -0.0195 -0.0482 0.0000 -0.3179 1.0950 -1.8740 0.4282 0.8956 0.7310 0.5779 0.0403 0.6771 0.5689 -0.2556 -0.3775 -0.2959 -1.4751 -0.2340 0.1184 0.3148 1.4435 -0.3510 0.6232 0.7990 0.9409 -0.9921 0.2120 0.2379 -1.0078 -0.7420 1.0823 -0.1315 0.3899 0.0880 -0.6355 -0.5596 0.4437 -0.9499 0.7812 0.5690 -0.8217 -0.2656 -1.1878 -2.2023 0.9863 -0.5186 0.3274 0.2341 0.0215 -1.0039 -0.9471 -0.3744 -1.1859 -1.0559 1.4725 0.0557 -1.2173 -0.0412 -1.1283 -1.3493 -0.2611 0.9535 0.1286 0.6565 -1.1678 -0.4606 -0.2624 -1.2132 -1.3194 0.9312 0.0112 -0.6451 0.8057 0.2316 -0.9898 1.3396 0.2895 1.4789 1.1380 -0.6841 -1.2919 -0.0729 -0.3306 -0.8436 0.4978 1.4885 -0.5465 -0.8468 -0.2463 0.6630 -0.8542 -1.2013 -0.1199 -0.0653 0.4853 -0.5955 -0.1497 -0.4348 -0.0793 1.5352 -0.6065 -1.3474 0.4694 -0.9036 0.0359 -0.6275 0.5354 0.5529 -0.2037 -2.0543 0.1326 1.5929 1.0184 -1.5804 -0.0787 -0.6817 -1.0246 -1.2344 0.2888 -0.4293 0.0558 -0.3679 -0.4650 0.3710 0.7283 2.1122 -1.3573 -1.0226 1.0378 -0.3898 -1.3813 0.3155 1.5532 0.7079 1.9574 0.5045 1.8645 -0.3398 -1.1398 -0.2111 1.1902 -1.1162 0.6353 -0.6014 0.5512 -1.0998 0.0860 -2.0046 -0.4931 0.4620 -0.3210 1.2366 -0.6313 -2.3252 -1.2316 1.0556 -0.1132 0.3792 0.9442 -2.1204 -0.6447 -0.7043 -1.0181 -0.1821 1.5210 -0.0384 1.2274 -0.6962 0.0075 -0.7829 0.5869 -0.2512 0.4801 0.6682 -0.0783 0.8892 2.3093 0.5246 -0.0118 0.9131 0.0559 -1.1071 0.4855 -0.0050 -0.2762 1.2765 1.8634 -0.5226 0.1034 -0.8076 0.6804 -2.3646 0.9901 0.2189 0.2617 1.2134 -0.2747 -0.1331 -1.2705 -1.6636 -0.7036 0.2809 -0.5412 -1.3335 1.0727 -0.7121 -0.0113 -0.0008 -0.2494 0.3966 -0.2640 -1.6640 -1.0290 0.2431 -1.2566 -0.3472 -0.9414 -1.1746 -1.0211 -0.4017 0.1737 -0.1161 1.0641 -0.2454 -1.5175 0.0097 0.0714 0.3165 0.4998 1.2781 -0.5478 0.2608 -0.0132 -0.5803 2.1363 -0.2576 -1.4095 1.7701 0.3255 -1.1190 0.6204 1.2698 -0.8960 0.1352 -0.1390 -1.1634 1.1837 -0.0154 0.5362 -0.7164 -0.6556 0.3144 0.1068 1.8482 -0.2751 2.2126 1.5085 -1.9451 -1.6805 -0.5735 -0.1858 0.0089 0.8369 -0.7223 -0.7215 -0.2012 -0.0205 0.2789 1.0583 0.6217 -1.7506 0.6973 0.8115 0.6363 1.3101 0.3271 -0.6730 -0.1493 -2.4490 0.4733 0.1169 -0.5911 -0.6547 -1.0807 -0.0477 0.3793 -0.3304 -0.4999 -0.0360 -0.1748 -0.9573 1.2925 0.4409 1.2809 -0.4977 -1.1187 0.8076 0.0412 -0.7562 -0.0891 -2.0089 1.0839 -0.9812 -0.6885 1.3395 -0.9092 -0.4129 -0.5062 1.6197 0.0809 -1.0811 -1.1245 1.7357 1.9375 1.6351 -1.2559 -0.2135 -0.1989 0.3075 -0.5723 -0.9776 -0.4468 1.0821 2.3726 0.2293 -0.2666 0.7017 -0.4876 1.8625 1.1069 -1.2276 -0.6699 1.3409 0.3881 0.3931 -1.7073 0.2279 0.6856 -0.6368 -1.0026 -0.1856 -1.0540 -0.0715 0.2792 1.3733 0.1798 -0.5420 1.6342 0.8252 0.2308 0.6716 -0.5081 0.8564 0.2685 0.6250 -1.0473 1.5357 0.4344 -1.9171 0.4699 1.2744 0.6385 1.3808 1.3198 -0.9094 -2.3056 1.7887 0.3908 0.0203 -0.4060 -1.5349 0.2214 -1.3745 -0.8393 -0.2086 0.7559 0.3757 -1.3454 1.4819 0.0327 1.8705 -1.2090 -0.7826 -0.7673 -0.1072 -0.9771 -0.9640 -2.3792 -0.8382 0.2573 -0.1838 -0.1676 -0.1170 0.1685 -0.5012 -0.7051 0.5082 -0.4209 0.2291 -0.9595 -0.1460 0.7445 -0.8905 0.1391 -0.2361 -0.0755 -0.3586 -2.0776 -0.1435 1.3933 0.6518 -0.3771 -0.6614 0.2490 -0.3835 -0.5285 0.0554 1.2538 -2.5200 0.5849 -1.0081 0.9443 -2.4240 -0.2238 0.0581 -0.4246 -0.2029 -1.5131 -1.1264 -0.8150 0.3666 -0.5861 1.5374 0.1401 -1.8628 -0.4542 -0.6521 0.1033 -0.2206 -0.2790 -0.7337 -0.0645 -1.4440 0.6123 -1.3235 -0.6616 -0.1461 0.2481 -0.0766 1.7382 1.6220 0.6264 0.0918 -0.8076 -0.4613 -1.4060 -0.3745 -0.4709 1.7513 0.7532 0.0650 -0.2928 0.0828 0.7662 2.2368 0.3269 0.8633 0.6794 0.5548 1.0016 1.2594 0.0442 -0.3141 0.2267 0.9967 1.2159 -0.5427 0.9122 -0.1721 -0.3360 0.5415 0.9321 -0.5703 -1.4986 -0.0503 0.5530 0.0835 1.5775 -0.3308 0.7952 -0.7848 -1.2631 0.6667 -1.3926 -1.3006 -0.6050 -1.4886 0.5585 -0.2774 -1.2937 -0.8884 -0.9865 -0.0716 -2.4146 -0.6943 -1.3914 0.3296 0.5985 0.1472 -0.1014 -2.6350 0.0281 -0.8763 -0.2655 -0.3276 -1.1582 0.5801 0.2398 -0.3509 0.8921 1.5783 -1.1082 -0.0259 -1.1106 0.7508 0.5002 -0.5173 -0.5592 -0.7534 0.9258 -0.2485 -0.1498 -1.2584 0.3126 2.6903 0.2897 -1.4228 0.2468 -1.4358 0.1486 -1.6931 0.7192 1.1418 1.5519 1.3836 -0.7581 0.4427 0.9111 -1.0741 0.2018 0.7629 -1.2882 -0.9530 0.7782 -0.0063 0.5245 1.3643 0.4820 -0.7871 0.7520 -0.1669 -0.8162 2.0941 0.0802 -0.9373 0.6357 1.6820 0.5936 0.7902 0.1053 -0.1586 0.8709 -0.1948 0.0755 -0.5266 -0.6855 -0.2684 -1.1883 0.2486 0.1025 -0.0410 -2.2476 -0.5108 0.2492 0.3692 0.1792 -0.0373 -1.6033 0.3394 -0.1311 0.4852 0.5988 -0.0860 0.3253 -0.3351 -0.3224 -0.3824 -0.9534 0.2336 1.2352 -0.5785 -0.5015 0.7229 0.0395 1.5413 -1.7011 -1.0337 -0.7637 2.1764 0.4316 -0.4438 0.0300 -0.3157 0.9778 0.0183 0.8180 0.7023 -0.2313 -0.1137 0.1279 -0.7994 -0.2386 -0.0895 -1.0233 0.9375 -1.1317 -0.7107 -1.1695 1.0654 -0.6804 -1.7258 0.8132 1.4419 0.6723 0.1387 -0.8595 -0.7523 1.2296 1.1508 -0.6080 0.8062 0.2171 -0.3735 -0.8320 0.2869 -1.8189 -1.5731 2.0157 -0.0720 2.6289 -0.2433 0.1733 0.9232 -0.1786 -0.5217 1.4320 -0.8701 0.8075 -0.5106 0.7435 0.8479 -0.8299 0.5330 1.0328 -1.0520 0.3621 -0.0368 -1.2276 -0.2751 -0.1604 -1.0836 -1.9542 -0.9095 -0.0056 -1.7235 1.2631 -0.6004 -2.0639 0.1109 1.4876 0.0530 0.1620 -0.0269 0.1736 0.8822 0.1823 0.7553 0.5080 0.1319 0.2801 -0.9828 -0.9441 -0.0131 0.3543 -0.8947 0.8121 0.1095 2.7316 0.4111 -1.3069 0.3838 0.4995 -0.5108 0.2349 -0.5978 0.0208 0.4194 1.1911 0.7712 -2.6442 0.2854 0.8261 -0.0081 0.8584 0.7748 1.3059 1.2315 0.9586 -1.6545 -0.9904 0.6852 -0.9749 -0.6067 0.6868 0.0200 1.0638 -1.3410 0.4795 -1.6340 -1.4427 0.2938 -0.1404 -1.1303 -0.2925 -0.5825 -0.8963 0.2486 -1.4897 0.3135 -2.0251 0.5290 0.3435 0.7582 -0.6919 0.6802 -1.0725 0.8998 -2.1231 0.2847 -0.7333 -0.7734 0.1518 -0.3368 0.9708 -0.1072 1.0135 -0.4753 0.0689 0.3986 1.1163 0.6205 -0.2877 -1.3718 -0.6859 0.3317 -0.9977 0.2914 1.1071 0.2450 0.1650 0.4062 1.2160 1.4484 -1.0251 0.2054 0.5889 -0.2640 2.4953 0.8559 -0.8510 0.8119 0.7002 0.7599 -1.7129 1.5370 -1.6098 1.1095 -1.1097 0.3855 0.9652 0.8183 0.0370 -0.9260 -0.1119 -0.8030 -1.6650 -0.9014 0.5883 0.5542 -0.4152 0.0618 0.4574 0.1990 0.2576 2.0807 -2.2772 0.3390 0.2899 0.6623 -0.5809 0.8878 0.1719 0.8488 0.9638 1.3219 -0.0643 1.3171 0.2280 -1.4296 -0.1497 -0.5050 -1.7291 -0.4175 -0.6150 0.7208 0.3394 0.8828 0.2842 -0.1455 -0.0896 0.2892 1.1648 0.8057 -1.3556 0.1209 -0.2222 0.5717 -0.3001 1.1343 -0.1794 -1.4671 1.3953 0.4408 0.5654 -0.6936 0.8339 -2.2374 1.0976 -0.0016 -1.6146 -1.2287 0.2074 0.2209 -1.0061 -0.4531 1.3995 -0.4620 0.0327 0.7988 0.8968 0.1379 -1.6191 -1.6466 0.4287 -0.7372 0.5649 -1.3842 0.4603 0.6294 0.3798 -1.0133 -0.3472 0.4419 -1.5902 -0.7014 -1.0776 1.0022 1.7295 0.7090 -0.7479 0.2289 -0.2235 -0.8533 0.3456 0.1098 -1.1330 -0.6831 -0.2779 0.6548 -1.2484 -0.5975 -0.4818 0.9834 1.7621 1.4274 0.9118 0.3268 0.0696 -1.4998 -0.4182 -0.0210 0.2284 -1.0082 -0.6646 0.5582 -1.1885 -0.7755 0.2710 1.5350 -1.0523 0.6256 -0.7976 -0.3135 -0.6022 1.2591 0.8585 -2.1053 -0.3609 0.5536 -1.5564 -0.2067 -0.4256 0.4938 -0.8709 0.0798 -0.5216 -1.4139 -0.3843 -0.4579 -0.2915 -0.3012 -1.5886 1.0943 1.3242 -0.1265 -0.7372 0.2137 -0.4005 0.0649 -1.7580 1.6867 0.3274 X2=z.^2; hist(X2) mean(X2) ans = 0.8911 std(X2) ans = 1.2082 mens_heights=70+3*randn(1000,1); womens_heights=66+3*randn(1000,1); plot(mens_heights,womens_heights,'.') line([55 80],[55 80]) text(70,60,'men are taller') xlabel('man height') ylabel('woman height') title('my first MATLAB graph - wow!') sum('mens_heights'>'womens_heights') ??? Error using ==> > Array dimensions must match for binary array op. sum(mens_heights>womens_heights) ans = 825 matlabpath MATLABPATH Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:general: Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:ops: Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:lang: Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:elmat: Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:elfun: Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:specfun: Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:matfun: Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:datafun: Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:polyfun: Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:funfun: Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:sparfun: Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:graph2d: Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:graph3d: Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:specgraph: Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:graphics: Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:uitools: Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:strfun: Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:iofun: Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:timefun: Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:datatypes: Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:MacOS: Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:demos: Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab: Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:local: Macintosh HD:Applications Folder:MATLAB 5.2:bin: Macintosh HD:Applications Folder:MATLAB 5.2:extern: Macintosh HD:Applications Folder:MATLAB 5.2:help: Macintosh HD:Applications Folder:MATLAB 5.2: matlabpath(['Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:general;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:ops;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:lang;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:elmat;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:elfun;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:specfun;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:matfun;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:datafun;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:polyfun;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:funfun;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:sparfun;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:graph2d;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:graph3d;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:specgraph;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:graphics;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:uitools;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:strfun;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:iofun;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:timefun;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:datatypes;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:MacOS;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:demos;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:local;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:bin;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:extern;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:help;',... 'Macintosh HD:Applications Folder:MATLAB 5.2;',... 'Scientific Lab Server:Class Folders:Math 648 - Albert:teaching Bayes']); matlabpath(['Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:general;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:ops;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:lang;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:elmat;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:elfun;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:specfun;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:matfun;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:datafun;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:polyfun;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:funfun;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:sparfun;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:graph2d;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:graph3d;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:specgraph;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:graphics;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:uitools;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:strfun;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:iofun;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:timefun;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:datatypes;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:MacOS;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab:demos;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:matlab;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:Toolbox:local;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:bin;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:extern;',... 'Macintosh HD:Applications Folder:MATLAB 5.2:help;',... 'Macintosh HD:Applications Folder:MATLAB 5.2;',... 'Scientific Lab Server:Class Folders:Math 648 - Albert:teaching Bayes']); help bayes BAYES Bayes' rule for a independent sequence of outcomes. POST=BAYES(PRIOR,LIKE,DATA) returns a matrix POST of sequential posterior probabilities, where PRIOR is a column of prior probabilities, LIKE is the corresponding likelihood matrix, and DATA is a vector containing the sequential observations. prior=[1/3 1/3 1/3]; like=[2 1 1 2 1 2 2 1 1 1 3 1]/6 like = 0.3333 0.1667 0.1667 0.3333 0.1667 0.3333 0.3333 0.1667 0.1667 0.1667 0.5000 0.1667 data=[2 1 4 3 1 2 2 2 1 2]; post=bayes(prior,like,data); ??? Error using ==> .* Matrix dimensions must agree. Error in ==> Scientific Lab Server:Class Folders:Math 648 - Albert:teaching Bayes:bayes.m On line 15 ==> ps=current.*like(:,data(i)); prior=prior' prior = 0.3333 0.3333 0.3333 post=bayes(prior,like,data); post post = 0.2500 0.5000 0.2500 0.4000 0.4000 0.2000 0.5714 0.2857 0.1429 0.3636 0.3636 0.2727 0.5333 0.2667 0.2000 0.4211 0.4211 0.1579 0.2963 0.5926 0.1111 0.1860 0.7442 0.0698 0.3137 0.6275 0.0588 0.1928 0.7711 0.0361 plot(post) diary off