{"id":51809,"date":"2025-08-11T07:44:23","date_gmt":"2025-08-10T23:44:23","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/51809.html"},"modified":"2025-08-11T07:44:23","modified_gmt":"2025-08-10T23:44:23","slug":"%e3%80%90matlab%e4%bb%a3%e7%a0%81%e3%80%91%e6%bb%91%e5%8a%a8%e7%aa%97%e5%8f%a3%e6%bb%a4%e6%b3%a2%e4%bb%a3%e7%a0%81%e7%a4%ba%e4%be%8b%ef%bc%8c%e7%94%a8%e4%ba%8e%e8%ae%a1%e7%ae%97%e9%87%8f%e5%b0%8f","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/51809.html","title":{"rendered":"\u3010MATLAB\u4ee3\u7801\u3011\u6ed1\u52a8\u7a97\u53e3\u6ee4\u6ce2\u4ee3\u7801\u793a\u4f8b\uff0c\u7528\u4e8e\u8ba1\u7b97\u91cf\u5c0f\u3001\u5b58\u50a8\u6210\u672c\u4f4e\u7684\u573a\u666f\u3002\u9644\u5b8c\u6574\u4ee3\u7801"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250810234420-68992ed4c1ce0.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>\u5728\u5927\u89c4\u6a21\u6570\u636e\u5904\u7406\u6216\u9ad8\u9891\u91c7\u6837\u7cfb\u7edf\u4e2d&#xff0c;\u4f20\u7edf\u6ee4\u6ce2\u5668&#xff08;\u5982\u5361\u5c14\u66fc\u6ee4\u6ce2&#xff09;\u9762\u4e34&#xff1a;\u6570\u636e\u91cf\u8fc7\u5927&#xff0c;\u8ba1\u7b97\u8d1f\u62c5\u91cd&#xff1b;\u6ee4\u6ce2\u77e9\u9635\u7ef4\u5ea6\u81a8\u80c0&#xff0c;\u5b58\u50a8\u6210\u672c\u9ad8&#xff1b;\u5b9e\u65f6\u6027\u4e0b\u964d\u3002\u8fd9\u4e9b\u95ee\u9898\u53ef\u7531\u672c\u6587\u6240\u8ff0\u7684\u6ed1\u52a8\u7a97\u53e3\u6ee4\u6ce2\u6765\u89e3\u51b3\u3002 \u8ba2\u9605\u4e13\u680f\u540e&#xff0c;\u53ef\u76f4\u63a5\u67e5\u770b\u6e90\u4ee3\u7801&#xff0c;\u7c98\u8d34\u5230MATLAB\u7a7a\u811a\u672c\u4e2d\u5373\u53ef\u76f4\u63a5\u8fd0\u884c\u3001\u5f97\u5230\u7ed3\u679c\u3010\u672c\u6587\u9650\u65f6\u514d\u8d39\u8bd5\u8bfb&#xff0c;\u4e13\u680f\u5185\u8fd8\u6709\u66f4\u591a\u6ee4\u6ce2\u4ee3\u7801\u3011<\/p>\n<\/p>\n<h4>\u6587\u7ae0\u76ee\u5f55<\/h4>\n<ul>\n<li>\u8fd0\u884c\u7ed3\u679c<\/li>\n<li>MATLAB\u6e90\u4ee3\u7801<\/li>\n<li>\u7a0b\u5e8f\u8be6\u89e3<\/li>\n<li>\n<ul>\n<li>\u6570\u636e\u751f\u6210<\/li>\n<li>\u6ee4\u6ce2\u5904\u7406<\/li>\n<li>\u8bef\u5dee\u5206\u6790<\/li>\n<li>\u6269\u5c55\u5efa\u8bae<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2>\u8fd0\u884c\u7ed3\u679c<\/h2>\n<p>\u6ee4\u6ce2\u524d\u540e\u4fe1\u53f7\u503c\u7684\u66f2\u7ebf\u5982\u56fe&#xff1a; <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250810234421-68992ed567ce0.jpg\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> \u6ee4\u6ce2\u524d\u540e\u7684\u8bef\u5dee\u5bf9\u6bd4\u5982\u4e0b&#xff1a; <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250810234421-68992ed5b4870.jpg\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>\u547d\u4ee4\u884c\u8f93\u51fa&#xff1a; <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250810234422-68992ed61ad0e.jpg\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h2>MATLAB\u6e90\u4ee3\u7801<\/h2>\n<p>\u5b8c\u6574\u4ee3\u7801\u5982\u4e0b&#xff1a;<\/p>\n<p><span class=\"token comment\">% \u6ed1\u52a8\u6ee4\u6ce2\u4f8b\u7a0b&#xff0c;\u7528\u56fa\u5b9a\u7684\u6ed1\u52a8\u7a97\u53e3\u8fdb\u884c\u5e73\u5747\u6ee4\u6ce2<\/span><br \/>\n<span class=\"token comment\">% author:Evand&#xff08;VX&#xff1a;matlabfilter&#xff09;<\/span><br \/>\n<span class=\"token comment\">% 2025-08-06\/Ver1<\/span><br \/>\nclc<span class=\"token punctuation\">;<\/span>clear<span class=\"token punctuation\">;<\/span>close all<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">rng<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">%% \u6570\u636e\u751f\u6210<\/span><br \/>\n<span class=\"token comment\">% \u751f\u6210\u6a21\u62df\u539f\u59cb\u4fe1\u53f7\u4e0e\u566a\u58f0\u3001\u89c2\u6d4b\u4fe1\u53f7<\/span><br \/>\nn <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">1000<\/span><span class=\"token punctuation\">;<\/span><br \/>\ntrue_signal <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">sin<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token operator\">:<\/span>n<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">*<\/span> <span class=\"token number\">0.05<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>          <span class=\"token comment\">% \u539f\u59cb\u4fe1\u53f7<\/span><br \/>\nnoise <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0.5<\/span> <span class=\"token operator\">*<\/span> <span class=\"token function\">randn<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> n<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>                <span class=\"token comment\">% \u566a\u58f0<\/span><br \/>\nz <span class=\"token operator\">&#061;<\/span> true_signal <span class=\"token operator\">&#043;<\/span> noise<span class=\"token punctuation\">;<\/span>                 <span class=\"token comment\">% \u5e26\u566a\u89c2\u6d4b<\/span><\/p>\n<p><span class=\"token comment\">% \u6ed1\u52a8\u7a97\u53e3\u5e73\u5747\u6ee4\u6ce2<\/span><br \/>\nwindow_size <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">5<\/span><span class=\"token punctuation\">;<\/span><br \/>\nfiltered <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">zeros<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> n<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">for<\/span> k <span class=\"token operator\">&#061;<\/span> window_size<span class=\"token operator\">:<\/span>n<br \/>\n    <span class=\"token function\">filtered<\/span><span class=\"token punctuation\">(<\/span>k<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">mean<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">z<\/span><span class=\"token punctuation\">(<\/span>k<span class=\"token operator\">&#8211;<\/span>window_size<span class=\"token operator\">&#043;<\/span><span class=\"token number\">1<\/span><span class=\"token operator\">:<\/span>k<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">% \u5747\u503c\u6ee4\u6ce2<\/span><br \/>\n<span class=\"token keyword\">end<\/span><br \/>\n<span class=\"token comment\">%% \u540e\u5904\u7406<\/span><br \/>\n<span class=\"token comment\">% \u8bef\u5dee\u8ba1\u7b97<\/span><br \/>\nerr_z <span class=\"token operator\">&#061;<\/span> z <span class=\"token operator\">&#8211;<\/span> true_signal<span class=\"token punctuation\">;<\/span><br \/>\nerr_filtered <span class=\"token operator\">&#061;<\/span> filtered <span class=\"token operator\">&#8211;<\/span> true_signal<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">% \u7ed8\u56fe\u5bf9\u6bd4<\/span><br \/>\nfigure<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">plot<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token operator\">:<\/span>n<span class=\"token punctuation\">,<\/span> z<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;k:&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nhold on<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">plot<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token operator\">:<\/span>n<span class=\"token punctuation\">,<\/span> filtered<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;r&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;LineWidth&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">plot<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token operator\">:<\/span>n<span class=\"token punctuation\">,<\/span> true_signal<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;b&#8211;&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;LineWidth&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">legend<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\u89c2\u6d4b\u503c&#xff08;\u5e26\u566a&#xff09;&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;\u6ed1\u52a8\u7a97\u53e3\u6ee4\u6ce2\u540e\u7ed3\u679c&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;\u771f\u5b9e\u4fe1\u53f7&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">title<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\u6ed1\u52a8\u7a97\u53e3\u5e73\u5747\u6ee4\u6ce2\u6548\u679c&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">xlabel<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\u65f6\u95f4&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token function\">ylabel<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\u4fe1\u53f7\u503c\u5bf9\u6bd4&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">% \u8bef\u5dee\u5bf9\u6bd4<\/span><br \/>\nfigure<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">plot<\/span><span class=\"token punctuation\">(<\/span>err_z<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;k:&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nhold on<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">plot<\/span><span class=\"token punctuation\">(<\/span>err_filtered<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;r&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;LineWidth&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">legend<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\u89c2\u6d4b\u8bef\u5dee&#xff08;\u5e26\u566a&#xff09;&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;\u6ed1\u52a8\u7a97\u53e3\u6ee4\u6ce2\u540e\u7684\u8bef\u5dee&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">title<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\u6ed1\u52a8\u7a97\u53e3\u5e73\u5747\u6ee4\u6ce2\u6548\u679c&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">xlabel<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\u65f6\u95f4&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token function\">ylabel<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\u8bef\u5dee\u5bf9\u6bd4&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token function\">fprintf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\u89c2\u6d4b\u8bef\u5dee\u7edd\u5bf9\u503c\u7684\u6700\u5927\u503c  &#xff1a;%.2f\u3001\u5e73\u5747\u503c&#xff1a;%.2f\\\\n&#039;<\/span><span class=\"token punctuation\">,<\/span><span class=\"token function\">max<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">abs<\/span><span class=\"token punctuation\">(<\/span>err_z<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><span class=\"token function\">mean<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">abs<\/span><span class=\"token punctuation\">(<\/span>err_z<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">fprintf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\u6ee4\u6ce2\u540e\u8bef\u5dee\u7edd\u5bf9\u503c\u7684\u6700\u5927\u503c&#xff1a;%.2f\u3001\u5e73\u5747\u503c&#xff1a;%.2f\\\\n&#039;<\/span><span class=\"token punctuation\">,<\/span><span class=\"token function\">max<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">abs<\/span><span class=\"token punctuation\">(<\/span>err_filtered<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><span class=\"token function\">mean<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">abs<\/span><span class=\"token punctuation\">(<\/span>err_filtered<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token function\">fprintf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\u6ee4\u6ce2\u4f7f\u8bef\u5dee\u6700\u5927\u503c\u964d\u4f4e\u4e86&#xff1a;%.2f%%\\\\n&#039;<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">max<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">abs<\/span><span class=\"token punctuation\">(<\/span>err_z<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">&#8211;<\/span><span class=\"token function\">max<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">abs<\/span><span class=\"token punctuation\">(<\/span>err_filtered<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">\/<\/span><span class=\"token function\">max<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">abs<\/span><span class=\"token punctuation\">(<\/span>err_z<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">*<\/span><span class=\"token number\">100<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">fprintf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\u6ee4\u6ce2\u4f7f\u8bef\u5dee\u5e73\u5747\u503c\u964d\u4f4e\u4e86&#xff1a;%.2f%%\\\\n&#039;<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">mean<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">abs<\/span><span class=\"token punctuation\">(<\/span>err_z<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">&#8211;<\/span><span class=\"token function\">mean<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">abs<\/span><span class=\"token punctuation\">(<\/span>err_filtered<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">\/<\/span><span class=\"token function\">mean<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">abs<\/span><span class=\"token punctuation\">(<\/span>err_z<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">*<\/span><span class=\"token number\">100<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<h2>\u7a0b\u5e8f\u8be6\u89e3<\/h2>\n<p>\u672c\u4f8b\u7a0b\u6f14\u793a\u4e86\u5982\u4f55\u5728\u4e00\u7ef4\u4fe1\u53f7\u4e2d\u5e94\u7528\u56fa\u5b9a\u957f\u5ea6\u6ed1\u52a8\u7a97\u53e3\u7684\u5e73\u5747\u6ee4\u6ce2\u65b9\u6cd5&#xff0c;\u4ee5\u5b9e\u73b0\u5bf9\u9ad8\u9891\u566a\u58f0\u7684\u6291\u5236\u548c\u4fe1\u53f7\u5e73\u6ed1\u5904\u7406\u3002 \u4f18\u70b9&#xff1a;<\/p>\n<ul>\n<li>\u964d\u4f4e\u5185\u5b58\u9700\u6c42&#xff1b;<\/li>\n<li>\u5b9e\u65f6\u66f4\u65b0\u5feb&#xff1b;<\/li>\n<li>\u66f4\u9002\u7528\u4e8e\u975e\u5e73\u7a33\u7cfb\u7edf\u3002<\/li>\n<\/ul>\n<p>\u7a0b\u5e8f\u7684\u7ed3\u6784\u5982\u4e0b&#xff1a;<\/p>\n<h3>\u6570\u636e\u751f\u6210<\/h3>\n<p>\u7a0b\u5e8f\u9996\u5148\u751f\u6210\u957f\u5ea6\u4e3a 1000 \u7684\u6b63\u5f26\u4fe1\u53f7\u4f5c\u4e3a\u771f\u5b9e\u4fe1\u53f7&#xff0c;\u540c\u65f6\u53e0\u52a0\u5747\u503c\u4e3a 0\u3001\u6807\u51c6\u5dee\u4e3a 0.5 \u7684\u9ad8\u65af\u767d\u566a\u58f0\u6784\u6210\u5e26\u566a\u89c2\u6d4b\u4fe1\u53f7&#xff1a;<\/p>\n<p>true_signal <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">sin<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token operator\">:<\/span>n<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">*<\/span> <span 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