{"id":77,"date":"2024-01-14T22:08:55","date_gmt":"2024-01-14T14:08:55","guid":{"rendered":"https:\/\/blog.huohh.cn\/?p=77"},"modified":"2024-01-15T22:17:22","modified_gmt":"2024-01-15T14:17:22","slug":"matlab%e5%ad%a6%e4%b9%a0%e7%ac%94%e8%ae%b0","status":"publish","type":"post","link":"https:\/\/blog.huohh.cn\/?p=77","title":{"rendered":"MATLAB\u5b66\u4e60\u7b14\u8bb01"},"content":{"rendered":"\n<p><strong>\u57fa\u7840\u77e5\u8bc6<\/strong><\/p>\n\n\n\n<p>MATLAB\u4ece1\u5f00\u59cb\uff0cC\u8bed\u8a00\u7b49\u5176\u4ed6\u8bed\u8a00\u4ece0\u5f00\u59cb\u3002<\/p>\n\n\n\n<p>\u8d4b\u503c\u65b9\u6cd5\u4e0e\u5176\u4ed6\u8bed\u8a00\u76f8\u540c\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>a = 10\nchar(97)\nstr = \" I love you \"\nnum2str(pi) %\u5c06\u4efb\u4f55\u6570\u5b57\u8f6c\u6362\u4e3a\u5bf9\u5e94\u7684\u5b57\u7b26\u4e32\n            %\u8f93\u51faans ='3.1416'<\/code><\/pre>\n\n\n\n<p><strong>\u77e9\u9635<\/strong><\/p>\n\n\n\n<p>\u57fa\u672c\u7684\u8d4b\u503c<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>A = &#91;1 2 3; 4 5 6; 7 8 9]\n%{\n\u8f93\u51faA =\n     1     2     3\n     4     5     6\n     7     8     9\n%}\n<\/code><\/pre>\n\n\n\n<p>\u8f6c\u7f6e\uff08\u884c\u5217\u4e92\u6362\uff09<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>B = A'\n%\u5373\u5c06\u539f\u59cb\u77e9\u9635\u7684\u884c\u53d8\u6210\u65b0\u77e9\u9635\u7684\u5217\uff0c\u539f\u59cb\u77e9\u9635\u7684\u5217\u53d8\u6210\u65b0\u77e9\u9635\u7684\u884c<\/code><\/pre>\n\n\n\n<p>\u6309\u5217\u987a\u5e8f\u5c55\u5f00\u6210\u4e00\u5217<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code><code>C = A(:)<\/code>%\u8868\u793a\u5c06\u77e9\u9635 A \u4e2d\u7684\u6240\u6709\u5143\u7d20\u6309\u5217\uff08\u5217\u4e3b\u5e8f\uff09\u5c55\u5f00\u6210\u4e00\u4e2a\u5217\u5411\u91cf C\u3002<\/code><\/pre>\n\n\n\n<p>\u9006\u77e9\u9635<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>D = inv(A)\n%\u9006\u77e9\u9635\u662f\u4e00\u4e2a\u4e0e\u539f\u59cb\u77e9\u9635\u76f8\u4e58\u540e\u5f97\u5230\u5355\u4f4d\u77e9\u9635\u7684\u77e9\u9635\uff0c\u524d\u63d0\u662f\u8be5\u77e9\u9635\u5fc5\u987b\u662f\u53ef\u9006\u7684\uff08\u5373\uff0c\u5176\u884c\u5217\u5f0f\u4e0d\u4e3a\u96f6\uff09\u3002<\/code><\/pre>\n\n\n\n<p>\u751f\u62100\u77e9\u9635<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>E = zeros(10,5,3) %10\u884c5\u52173\u5c42\uff08\u4e00\u7ef4\u4e8c\u7ef4\u4e09\u7ef4\uff09<\/code><\/pre>\n\n\n\n<p>\u4e09\u7ef4\u77e9\u9635\u8d4b\u503c<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>E(:,:,1) = rand(10,5)\n%\u5c06\u5728\u4e09\u7ef4\u6570\u7ec4 E \u7684\u7b2c\u4e00\u4e2a\u7ef4\u5ea6\u4e2d\u7684\u7b2c\u4e00\u4e2a\u5207\u7247\uff08\u6216\u79f0\u4e3a\u7b2c\u4e00\u4e2a\u4e8c\u7ef4\u77e9\u9635\uff09\u4e2d\u751f\u6210\u968f\u673a\u6570\u5e76\u8d4b\u503c\u3002\nE(:,:,2) = rand(10,5,'double')\n%\u751f\u6210\u53cc\u7cbe\u5ea6\u968f\u673a\u6570\u5e76\u8d4b\u503c<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>E(:,:,1) = randn(10,5)\n%\u4ea7\u751f\u6807\u51c6\u6b63\u6001\u5206\u5e03\u7684\u968f\u673a\u6570<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>E(:,:,2) = randi(&#91;1, 100], 10, 5); \n% \u751f\u6210 1 \u5230 100 \u8303\u56f4\u5185\u7684\u968f\u673a\u6574\u6570<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>%<mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-amber-color\">': '\u8868\u793a\u9009\u62e9\u8be5\u7ef4\u5ea6\u7684\u6240\u6709\u5143\u7d20\u3002<\/mark><\/code><\/pre>\n\n\n\n<p><strong>\u5143\u80de\u6570\u7ec4<\/strong><\/p>\n\n\n\n<p>MATLAB\u4e2d\u7279\u6709\u7684\u6570\u636e\u7c7b\u578b\uff0c\u662f\u6570\u7ec4\u7684\u7c7b\u578b\u3002\u4e0e\u666e\u901a\u7684\u77e9\u9635\u4e0d\u540c\uff0c\u5143\u80de\u6570\u7ec4\u7684\u6bcf\u4e2a\u5143\u7d20\u53ef\u4ee5\u662f\u4efb\u4f55\u7c7b\u578b\u7684\u6570\u636e\uff0c\u5305\u62ec\u6570\u5b57\u3001\u6587\u672c\u3001\u5176\u4ed6\u5143\u80de\u6570\u7ec4\u3001\u7ed3\u6784\u4f53\u7b49\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>A = cell(1,6)  %\u521b\u5efa\u6570\u7ec4\nC = {'apple', 42, &#91;1, 2, 3]}; %\u521b\u5efa\u6570\u7ec4\u5e76\u76f4\u63a5\u8d4b\u503c\n<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>A{2} = eye(3) %\u8d4b\u503c\u5f62\u5f0f<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>B = A{5} %\u5c06A5\u4e2d\u7684\u6570\u636e\uff08\u6570\u7ec4\uff09\u53d6\u51fa\u8d4b\u7ed9B<\/code><\/pre>\n\n\n\n<p><strong>\u7ed3\u6784\u4f53<\/strong><\/p>\n\n\n\n<p>\u7ed3\u6784\u4f53\uff08Structure\uff0c\u901a\u5e38\u7f29\u5199\u4e3a &#8220;struct&#8221;\uff09\u662f\u4e00\u79cd\u590d\u5408\u6570\u636e\u7c7b\u578b\uff0c\u7528\u4e8e\u7ec4\u7ec7\u548c\u5b58\u50a8\u591a\u4e2a\u4e0d\u540c\u7c7b\u578b\u7684\u6570\u636e\u6210\u5458\uff0c\u6bcf\u4e2a\u6570\u636e\u6210\u5458\u90fd\u6709\u4e00\u4e2a\u5b57\u6bb5\u540d\uff08Field Name\uff09\u6765\u6807\u8bc6\u5b83\u3002\u7ed3\u6784\u4f53\u5141\u8bb8\u60a8\u5c06\u76f8\u5173\u7684\u6570\u636e\u805a\u5408\u5728\u4e00\u8d77\uff0c\u4ee5\u4fbf\u66f4\u65b9\u4fbf\u5730\u7ba1\u7406\u548c\u8bbf\u95ee\u8fd9\u4e9b\u6570\u636e\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>person = struct('Name', 'John', 'Age', 30, 'City', 'New York');\nname = person.Name; % \u83b7\u53d6\u59d3\u540d\u5b57\u6bb5\u7684\u503c\nage = person.Age;   % \u83b7\u53d6\u5e74\u9f84\u5b57\u6bb5\u7684\u503c\n<\/code><\/pre>\n\n\n\n<p>\u5173\u4e8e\u4f7f\u7528\uff08\uff09\u548c{}\u533a\u522b\u7684\u8be6\u7ec6\u89e3\u91ca<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>books.name(1) %\u5c06\u8fd4\u56de\u7ed3\u6784\u4f53\u6570\u7ec4\u4e2d\u7b2c\u4e00\u4e2a\u5143\u7d20\u7684name\u5b57\u6bb5\u7684\u503c\u3002\u8fd9\u91cc\u76841\u8868\u793a\u6570\u7ec4\u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\u3002\nbooks.name{1} %\u5c06\u8fd4\u56de\u7b2c\u4e00\u4e2a\u5143\u80de\u4e2dname\u5b57\u6bb5\u7684\u5185\u5bb9\u3002{}\u8868\u793a\u5bf9\u5143\u80de\u6570\u7ec4\u7684\u5185\u5bb9\u8fdb\u884c\u76f4\u63a5\u8bbf\u95ee\uff0c\u800c\u4e0d\u662f\u8bbf\u95ee\u5143\u80de\u672c\u8eab\u3002<\/code><\/pre>\n\n\n\n<p>\u8fd9\u79cd\u533a\u522b\u5728\u4e8e\uff0c<code>()<\/code> \u7528\u4e8e\u8bbf\u95ee\u5143\u80de\u6570\u7ec4\u672c\u8eab\uff08\u4fdd\u7559\u5143\u80de\u5c01\u88c5\uff09\uff0c\u800c <code>{}<\/code> \u7528\u4e8e\u8bbf\u95ee\u5143\u80de\u4e2d\u7684\u5177\u4f53\u5185\u5bb9\uff08\u53bb\u9664\u5143\u80de\u5c01\u88c5\uff09\u3002\u5f53\u4f60\u9700\u8981\u64cd\u4f5c\u6216\u63d0\u53d6\u5143\u80de\u4e2d\u7684\u5177\u4f53\u6570\u636e\u65f6\uff0c\u901a\u5e38\u4f1a\u4f7f\u7528 <code>{}<\/code>\u3002<\/p>\n\n\n\n<p>\u6211\u4eec\u4e3e\u4e00\u4e2a\u4f8b\u5b50\u6765\u8bf4\u660e\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>C = {'Apple', 'Banana', 'Cherry'};<\/code><\/pre>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u4f7f\u7528 <code>C(1)<\/code>\uff1a\n<ul class=\"wp-block-list\">\n<li>\u8fd9\u5c06\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684\u5143\u80de\u6570\u7ec4\uff0c\u8be5\u6570\u7ec4\u53ea\u5305\u542b\u539f\u6570\u7ec4\u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\u3002<\/li>\n\n\n\n<li>\u7ed3\u679c\u662f\u4e00\u4e2a\u5305\u542b\u5355\u4e2a\u5143\u7d20\u7684\u5143\u80de\u6570\u7ec4\uff0c\u5373 <code>{'Apple'}<\/code>\u3002<\/li>\n\n\n\n<li>\u8fd9\u610f\u5473\u7740\u7ed3\u679c\u672c\u8eab\u4ecd\u7136\u662f\u4e00\u4e2a\u5143\u80de\u6570\u7ec4\u3002<\/li>\n\n\n\n<li>\u5f53\u6211\u4eec\u4f7f\u7528 <code>C(1)<\/code>\uff08\u6a21\u62df\u4e3a <code>[C[0]]<\/code>\uff09\uff0c\u7ed3\u679c\u662f <code>['Apple']<\/code>\u3002\u8fd9\u662f\u4e00\u4e2a\u5305\u542b\u4e00\u4e2a\u5143\u7d20\u7684\u6570\u7ec4\uff08\u7c7b\u4f3c\u4e8eMATLAB\u4e2d\u7684\u5143\u80de\u6570\u7ec4\uff09\uff0c\u5176\u4e2d\u8be5\u5143\u7d20\u662f\u5b57\u7b26\u4e32 <code>'Apple'<\/code>\u3002\uff08Python\u6a21\u62df\uff09<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u4f7f\u7528 <code>C{1}<\/code>\uff1a\n<ul class=\"wp-block-list\">\n<li>\u8fd9\u5c06\u76f4\u63a5\u63d0\u53d6\u5143\u80de\u6570\u7ec4\u4e2d\u7b2c\u4e00\u4e2a\u5143\u7d20\u7684\u5185\u5bb9\u3002<\/li>\n\n\n\n<li>\u7ed3\u679c\u662f\u4e00\u4e2a\u5b57\u7b26\u4e32\uff0c\u5373 <code>'Apple'<\/code>\u3002<\/li>\n\n\n\n<li>\u8fd9\u610f\u5473\u7740\u6211\u4eec\u83b7\u5f97\u7684\u662f\u5143\u80de\u5185\u90e8\u7684\u6570\u636e\uff0c\u800c\u4e0d\u662f\u5143\u80de\u672c\u8eab\u3002<\/li>\n\n\n\n<li>\u5f53\u6211\u4eec\u4f7f\u7528 <code>C{1}<\/code>\uff08\u6a21\u62df\u4e3a <code>C[0]<\/code>\uff09\uff0c\u7ed3\u679c\u662f <code>'Apple'<\/code>\u3002\u8fd9\u662f\u76f4\u63a5\u4ece\u5143\u80de\u4e2d\u63d0\u53d6\u51fa\u7684\u5b57\u7b26\u4e32\uff0c\u4e0d\u662f\u4e00\u4e2a\u5143\u80de\u6570\u7ec4\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p>\u603b\u7ed3\u6765\u8bf4\uff0c\uff08\uff09\u628a\u67d0\u4e00\u4e2acell\u6574\u4f53\u62bd\u51fa\uff0c{}\u8bfb\u53d6\u4e86\u67d0\u4e00cell\u91cc\u9762\u7684\u5177\u4f53\u6570\u636e\u3002<\/p>\n\n\n\n<p><strong>\u77e9\u9635\u64cd\u4f5c<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>A = &#91;1 2 3 4 5 6] %\u8d4b\u503c\nB = 1:2:9 %\u8be5\u5411\u91cf\u4ece1\u5f00\u59cb\uff0c\u4ee52\u4e3a\u6b65\u957f\uff0c\u589e\u52a0\u52309\uff08\u6216\u6700\u63a5\u8fd19\u7684\u6570\uff0c\u4f46\u4e0d\u8d85\u8fc79\uff09&#91;1, 3, 5, 7, 9]<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>C = repmat(B,3,2) %\u91cd\u590d\u67d0\u4e00\u77e9\u9635\uff0c\u884c3\u6b21\uff0c\u52172\u6b21\n%{\nB = &#91;1, 3, 5, 7, 9]\nC = repmat(B,3,2)\n\u8f93\u51fa\uff1a &#91;1, 3, 5, 7, 9, 1, 3, 5, 7, 9]\n       &#91;1, 3, 5, 7, 9, 1, 3, 5, 7, 9]\n       &#91;1, 3, 5, 7, 9, 1, 3, 5, 7, 9]\n%}<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>D = ones(2,4) %\u751f\u6210x\u884cx\u5217\u51681\u77e9\u9635<\/code><\/pre>\n\n\n\n<p>\u77e9\u9635\u7684\u56db\u5219\u8fd0\u7b97<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>C = A + B\nD = A - B\n%\u5bf9\u5e94\u7684\u5730\u65b9\u76f8\u52a0\u76f8\u51cf<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>E = A * B\n%\u4f20\u7edf\u7684\u77e9\u9635\u76f8\u4e58\nF = A .* B\n%\u77e9\u9635\u5bf9\u5e94\u4f4d\u7f6e\u76f8\u4e58\nG = A \/ B\nH = A .\/ B<\/code><\/pre>\n\n\n\n<p>*\u4f20\u7edf\u77e9\u9635\u76f8\u4e58\u65b9\u6cd5\uff1a<\/p>\n\n\n\n<p class=\"has-text-align-left\">\u77e9\u9635 A<div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/s0.wp.com\/latex.php?latex=A+%3D+%5Cbegin%7Bbmatrix%7D+a_%7B11%7D+%26+a_%7B12%7D+%5C%5C+a_%7B21%7D+%26+a_%7B22%7D+%5Cend%7Bbmatrix%7D&#038;bg=ffffff&#038;fg=000&#038;s=0&#038;c=20201002'><img class=\"lazyload lazyload-style-none\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/s0.wp.com\/latex.php?latex=A+%3D+%5Cbegin%7Bbmatrix%7D+a_%7B11%7D+%26+a_%7B12%7D+%5C%5C+a_%7B21%7D+%26+a_%7B22%7D+%5Cend%7Bbmatrix%7D&#038;bg=ffffff&#038;fg=000&#038;s=0&#038;c=20201002\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"A = &#92;begin{bmatrix} a_{11} &amp; a_{12} &#92;&#92; a_{21} &amp; a_{22} &#92;end{bmatrix}\" class=\"latex\" \/><\/div><\/p>\n\n\n\n<p>\u77e9\u9635 B<div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/s0.wp.com\/latex.php?latex=B+%3D+%5Cbegin%7Bbmatrix%7D+b_%7B11%7D+%26+b_%7B12%7D+%5C%5C+b_%7B21%7D+%26+b_%7B22%7D+%5Cend%7Bbmatrix%7D&#038;bg=ffffff&#038;fg=000&#038;s=0&#038;c=20201002'><img class=\"lazyload lazyload-style-none\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/s0.wp.com\/latex.php?latex=B+%3D+%5Cbegin%7Bbmatrix%7D+b_%7B11%7D+%26+b_%7B12%7D+%5C%5C+b_%7B21%7D+%26+b_%7B22%7D+%5Cend%7Bbmatrix%7D&#038;bg=ffffff&#038;fg=000&#038;s=0&#038;c=20201002\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"B = &#92;begin{bmatrix} b_{11} &amp; b_{12} &#92;&#92; b_{21} &amp; b_{22} &#92;end{bmatrix}\" class=\"latex\" \/><\/div><\/p>\n\n\n\n<p>\u4e58\u79ef C \u7684\u5143\u7d20 C[i, j] \u8ba1\u7b97\u516c\u5f0f<div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/s0.wp.com\/latex.php?latex=C%5Bi%2C+j%5D+%3D+%5Csum_%7Bk%3D1%7D%5E%7Bn%7D+A%5Bi%2C+k%5D+%5Ctimes+B%5Bk%2C+j%5D&#038;bg=ffffff&#038;fg=000&#038;s=0&#038;c=20201002'><img class=\"lazyload lazyload-style-none\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/s0.wp.com\/latex.php?latex=C%5Bi%2C+j%5D+%3D+%5Csum_%7Bk%3D1%7D%5E%7Bn%7D+A%5Bi%2C+k%5D+%5Ctimes+B%5Bk%2C+j%5D&#038;bg=ffffff&#038;fg=000&#038;s=0&#038;c=20201002\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"C[i, j] = &#92;sum_{k=1}^{n} A[i, k] &#92;times B[k, j]\" class=\"latex\" \/><\/div><\/p>\n\n\n\n<p>\u5177\u4f53\u7684\u4e58\u79ef\u793a\u4f8b<\/p>\n\n\n\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/s0.wp.com\/latex.php?latex=C+%3D+%5Cbegin%7Bbmatrix%7D+a_%7B11%7Db_%7B11%7D+%2B+a_%7B12%7Db_%7B21%7D+%26+a_%7B11%7Db_%7B12%7D+%2B+a_%7B12%7Db_%7B22%7D+%5C%5C+a_%7B21%7Db_%7B11%7D+%2B+a_%7B22%7Db_%7B21%7D+%26+a_%7B21%7Db_%7B12%7D+%2B+a_%7B22%7Db_%7B22%7D+%5Cend%7Bbmatrix%7D&#038;bg=ffffff&#038;fg=000&#038;s=0&#038;c=20201002'><img class=\"lazyload lazyload-style-none\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/s0.wp.com\/latex.php?latex=C+%3D+%5Cbegin%7Bbmatrix%7D+a_%7B11%7Db_%7B11%7D+%2B+a_%7B12%7Db_%7B21%7D+%26+a_%7B11%7Db_%7B12%7D+%2B+a_%7B12%7Db_%7B22%7D+%5C%5C+a_%7B21%7Db_%7B11%7D+%2B+a_%7B22%7Db_%7B21%7D+%26+a_%7B21%7Db_%7B12%7D+%2B+a_%7B22%7Db_%7B22%7D+%5Cend%7Bbmatrix%7D&#038;bg=ffffff&#038;fg=000&#038;s=0&#038;c=20201002\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"C = &#92;begin{bmatrix} a_{11}b_{11} + a_{12}b_{21} &amp; a_{11}b_{12} + a_{12}b_{22} &#92;&#92; a_{21}b_{11} + a_{22}b_{21} &amp; a_{21}b_{12} + a_{22}b_{22} &#92;end{bmatrix}\" class=\"latex\" \/><\/div><\/p>\n\n\n\n<p><strong>\u77e9\u9635\u7684\u4e0b\u6807<\/strong>(\u77e9\u9635\u4e2d\u6570\u636e\u7684\u5b9a\u4f4d\uff09<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>A = magic(5)\nB = A(2,3)\nC = A(3,:)\nD = A(:,4)\n&#91;m,n] = find(A > 20) %\u67e5\u627eA\u77e9\u9635\u4e2d\u5927\u4e8e20\u503c\u7684\u4e0b\u6807\uff0c\u5c06\u503c\u8d4b\u7ed9m\u548cn<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u57fa\u7840\u77e5\u8bc6 MATLAB\u4ece1\u5f00\u59cb\uff0cC\u8bed\u8a00\u7b49\u5176\u4ed6\u8bed\u8a00\u4ece0\u5f00\u59cb\u3002 \u8d4b\u503c\u65b9\u6cd5\u4e0e\u5176\u4ed6\u8bed\u8a00\u76f8\u540c\u3002 \u77e9\u9635 \u57fa\u672c\u7684\u8d4b\u503c \u8f6c\u7f6e\uff08 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[3],"tags":[],"class_list":["post-77","post","type-post","status-publish","format-standard","hentry","category-matlab"],"jetpack_featured_media_url":"","jetpack-related-posts":[{"id":176,"url":"https:\/\/blog.huohh.cn\/?p=176","url_meta":{"origin":77,"position":0},"title":"MATLAB\u4e8c\u7ef4\u5e73\u9762\u7ed8\u56fe","author":"1424495037","date":"2024\u5e741\u670818\u65e5","format":false,"excerpt":"x = 0:0.01:2*pi; y = sin(x); figure % \u521b\u5efa\u4e00\u4e2a\u5e55\u5e03 plot(\u2026","rel":"","context":"\u5728\u201cMATLAB\u201d\u4e2d","block_context":{"text":"MATLAB","link":"https:\/\/blog.huohh.cn\/?cat=3"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/blog.huohh.cn\/wp-content\/uploads\/2024\/01\/image-7.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/blog.huohh.cn\/wp-content\/uploads\/2024\/01\/image-7.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/blog.huohh.cn\/wp-content\/uploads\/2024\/01\/image-7.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/blog.huohh.cn\/wp-content\/uploads\/2024\/01\/image-7.png?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":187,"url":"https:\/\/blog.huohh.cn\/?p=187","url_meta":{"origin":77,"position":1},"title":"MATLAB\u4e09\u7ef4\u7acb\u4f53\u7ed8\u56fe","author":"1424495037","date":"2024\u5e741\u670818\u65e5","format":false,"excerpt":"% \u5b9a\u4e49\u53c2\u6570 t\uff0c\u4ece 0 \u5230 10\u03c0\uff0c\u6b65\u957f\u4e3a \u03c0\/50 t = 0:pi\/50:10*pi; % 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