{"id":128161,"date":"2024-03-25T05:24:05","date_gmt":"2024-03-24T20:24:05","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/matlab%e3%81%aefilter%e9%96%a2%e6%95%b0%e3%81%ae%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95\/"},"modified":"2024-04-05T16:13:24","modified_gmt":"2024-04-05T07:13:24","slug":"matlab%e3%81%aefilter%e9%96%a2%e6%95%b0%e3%81%ae%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/matlab%e3%81%aefilter%e9%96%a2%e6%95%b0%e3%81%ae%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95\/","title":{"rendered":"MATLAB\u306efilter\u95a2\u6570\u306e\u4f7f\u7528\u65b9\u6cd5"},"content":{"rendered":"<p>MATLAB\u306b\u304a\u3051\u308bfilter\u95a2\u6570\u306f\u3001\u4fe1\u53f7\u306b\u5bfe\u3057\u3066\u30c7\u30b8\u30bf\u30eb\u30d5\u30a3\u30eb\u30bf\u51e6\u7406\u3092\u884c\u3046\u3002\u30d5\u30a3\u30eb\u30bf\u30fc\u306e\u4fc2\u6570\u30d9\u30af\u30c8\u30eb\u3068\u30d5\u30a3\u30eb\u30bf\u51e6\u7406\u3057\u305f\u3044\u4fe1\u53f7\u306e2\u3064\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u53d6\u308b\u3002<\/p>\n<p>\u6587\u6cd5\u306f\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>y = filter(b, a, x)\r\n<\/code><\/pre>\n<p>\u30d5\u30a3\u30eb\u30bf\u306e\u5206\u5b50\u4fc2\u6570\u30d9\u30af\u30c8\u30eb\u304c b\u3001\u5206\u6bcd\u4fc2\u6570\u30d9\u30af\u30c8\u30eb\u304c a\u3001\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3055\u308c\u308b\u4fe1\u53f7\u304c x \u3067\u3059\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u3001\u6b63\u5f26\u6ce2\u4fe1\u53f7\u306b10\u968e\u306e\u30ed\u30fc\u30d1\u30b9\u30d5\u30a3\u30eb\u30bf\u3092\u304b\u3051\u308b\u5834\u5408\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3002<\/p>\n<pre class=\"post-pre\"><code>fs = <span class=\"hljs-number\">1000<\/span>; <span class=\"hljs-comment\">% \u91c7\u6837\u9891\u7387<\/span>\r\nt = <span class=\"hljs-number\">0<\/span>:<span class=\"hljs-number\">1<\/span>\/fs:<span class=\"hljs-number\">1<\/span>; <span class=\"hljs-comment\">% \u65f6\u95f4\u5e8f\u5217<\/span>\r\nf = <span class=\"hljs-number\">50<\/span>; <span class=\"hljs-comment\">% \u6b63\u5f26\u6ce2\u9891\u7387<\/span>\r\nx = <span class=\"hljs-built_in\">sin<\/span>(<span class=\"hljs-number\">2<\/span>*<span class=\"hljs-built_in\">pi<\/span>*f*t); <span class=\"hljs-comment\">% \u6b63\u5f26\u6ce2\u4fe1\u53f7<\/span>\r\n<span class=\"hljs-comment\">% \u4f4e\u901a\u6ee4\u6ce2\u5668\u7cfb\u6570<\/span>\r\nfc = <span class=\"hljs-number\">100<\/span>; <span class=\"hljs-comment\">% \u622a\u6b62\u9891\u7387<\/span>\r\n[b, a] = butter(<span class=\"hljs-number\">10<\/span>, fc\/(fs\/<span class=\"hljs-number\">2<\/span>));\r\n<span class=\"hljs-comment\">% \u4f7f\u7528filter\u51fd\u6570\u6ee4\u6ce2<\/span>\r\ny = filter(b, a, x);\r\n<span class=\"hljs-comment\">% \u7ed8\u5236\u7ed3\u679c<\/span>\r\n<span class=\"hljs-built_in\">figure<\/span>;\r\nsubplot(<span class=\"hljs-number\">2<\/span>, <span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">1<\/span>);\r\n<span class=\"hljs-built_in\">plot<\/span>(t, x);\r\ntitle(<span class=\"hljs-string\">'\u539f\u59cb\u4fe1\u53f7'<\/span>);\r\nsubplot(<span class=\"hljs-number\">2<\/span>, <span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">2<\/span>);\r\n<span class=\"hljs-built_in\">plot<\/span>(t, y);\r\ntitle(<span class=\"hljs-string\">'\u6ee4\u6ce2\u540e\u4fe1\u53f7'<\/span>);\r\n<\/code><\/pre>\n<p>\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001\u6b63\u5f26\u6ce2\u4fe1\u53f7\u3092\u5b9a\u7fa9\u3057\u3001butter \u95a2\u6570\u3067 10 \u6b21\u306e\u30ed\u30fc\u30d1\u30b9 \u30d5\u30a3\u30eb\u30bf\u4fc2\u6570\u3092\u751f\u6210\u3057\u3001\u6700\u5f8c\u306b filter \u95a2\u6570\u3067\u4fe1\u53f7\u3092\u30d5\u30a3\u30eb\u30bf\u3057\u3001\u5143\u306e\u4fe1\u53f7\u3068\u30d5\u30a3\u30eb\u30bf\u5f8c\u306e\u4fe1\u53f7\u3092\u63cf\u753b\u3057\u307e\u3059\u3002<\/p>\n<p>\u306a\u304a\u3001\u30d5\u30a3\u30eb\u30bf\u4fc2\u6570b\u3068a \u306e\u9577\u3055\u306f\u540c\u3058\u9577\u3055\u3067\u3042\u308a\u30010 \u3067\u306f\u306a\u3044\u3053\u3068\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>MATLAB\u306b\u304a\u3051\u308bfilter\u95a2\u6570\u306f\u3001\u4fe1\u53f7\u306b\u5bfe\u3057\u3066\u30c7\u30b8\u30bf\u30eb\u30d5\u30a3\u30eb\u30bf\u51e6\u7406\u3092\u884c\u3046\u3002\u30d5\u30a3\u30eb\u30bf\u30fc\u306e\u4fc2\u6570\u30d9\u30af\u30c8\u30eb\u3068\u30d5\u30a3\u30eb\u30bf\u51e6\u7406\u3057\u305f\u3044\u4fe1\u53f7\u306e2\u3064\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u53d6\u308b\u3002 \u6587\u6cd5\u306f\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002 y = filter(b, a, x) \u30d5 [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-128161","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is 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