{"id":1631,"date":"2023-07-25T14:26:50","date_gmt":"2023-07-25T14:26:50","guid":{"rendered":"https:\/\/statorials.org\/tr\/rde-smape\/"},"modified":"2023-07-25T14:26:50","modified_gmt":"2023-07-25T14:26:50","slug":"rde-smape","status":"publish","type":"post","link":"https:\/\/statorials.org\/tr\/rde-smape\/","title":{"rendered":"R&#39;de smape nas\u0131l hesaplan\u0131r"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Modellerin tahmin do\u011frulu\u011funu \u00f6l\u00e7mek i\u00e7in <strong>Simetrik Ortalama Mutlak Y\u00fczde Hatas\u0131 (SMAPE)<\/strong> kullan\u0131l\u0131r. A\u015fa\u011f\u0131daki \u015fekilde hesaplan\u0131r:<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>SMAPE<\/strong> = (1\/n) * \u03a3(|tahmin \u2013 ger\u00e7ek| \/ ((|ger\u00e7ek| + |tahmin|)\/2) * 100<\/span><\/p>\n<p> <span style=\"color: #000000;\">Alt\u0131n:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>\u03a3<\/strong> \u2013 \u201ctoplam\u201d anlam\u0131na gelen bir sembol<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>n<\/strong> \u2013 \u00f6rneklem b\u00fcy\u00fckl\u00fc\u011f\u00fc<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>ger\u00e7ek<\/strong> \u2013 verilerin ger\u00e7ek de\u011feri<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>tahmin<\/strong> \u2013 verilerin beklenen de\u011feri<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">SMAPE de\u011feri ne kadar k\u00fc\u00e7\u00fck olursa, belirli bir modelin tahmin do\u011frulu\u011fu o kadar iyi olur.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Bu e\u011fitimde R&#8217;de SMAPE&#8217;yi hesaplamak i\u00e7in kullanabilece\u011finiz iki farkl\u0131 y\u00f6ntem a\u00e7\u0131klanmaktad\u0131r.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Y\u00f6ntem 1: Metrics paketindeki smape() i\u015flevini kullan\u0131n<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">R&#8217;de SMAPE&#8217;yi hesaplaman\u0131n bir yolu <strong>Metrics<\/strong> paketindeki <strong>smape()<\/strong> i\u015flevini kullanmakt\u0131r:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #993300;\">library<\/span> (Metrics)\n\n<span style=\"color: #008080;\">#define actual values\n<\/span>actual &lt;- c(12, 13, 14, 15, 15, 22, 27)\n\n<span style=\"color: #008080;\">#define forecasted values\n<\/span>forecast &lt;- c(11, 13, 14, 14, 15, 16, 18)\n\n<span style=\"color: #008080;\">#calculate SMAPE\n<\/span>smape(actual, forecast)\n\n[1] 0.1245302\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Bu model i\u00e7in simetrik ortalama mutlak y\u00fczde hatas\u0131n\u0131n <strong>%12,45<\/strong> oldu\u011funu g\u00f6rebiliriz.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Y\u00f6ntem 2: Kendi i\u015flevinizi yaz\u0131n<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">SMAPE&#8217;yi hesaplaman\u0131n ba\u015fka bir yolu da kendi fonksiyonumuzu a\u015fa\u011f\u0131daki gibi olu\u015fturmakt\u0131r:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>find_smape &lt;- <span style=\"color: #993300;\">function<\/span> (a, f) {\n  <span style=\"color: #3366ff;\">return<\/span> ( <span style=\"color: #008000;\">1<\/span> \/length(a) * sum( <span style=\"color: #008000;\">2<\/span> *abs(fa) \/ (abs(a)+abs(f))* <span style=\"color: #008000;\">100<\/span> ))\n}\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Daha sonra bu i\u015flevi, ger\u00e7ek de\u011ferlerin bir vekt\u00f6r\u00fc ile tahmin edilen de\u011ferlerin bir vekt\u00f6r\u00fc aras\u0131ndaki SMAPE&#8217;yi hesaplamak i\u00e7in kullanabiliriz:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#define actual values\n<\/span>actual &lt;- c(12, 13, 14, 15, 15,22, 27)\n\n<span style=\"color: #008080;\">#define forecasted values\n<\/span>forecast &lt;- c(11, 13, 14, 14, 15, 16, 18)\n\n<span style=\"color: #008080;\">#calculate SMAPE\n<\/span>find_smape(actual, forecast)\n\n[1] 12.45302<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">SMAPE bir kez daha <strong>%12,45<\/strong> olarak ortaya \u00e7\u0131k\u0131yor ve bu da \u00f6nceki \u00f6rne\u011fin sonu\u00e7lar\u0131yla e\u015fle\u015fiyor.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Ek kaynaklar<\/strong><\/span><\/h3>\n<p> <a href=\"https:\/\/statorials.org\/tr\/r-karti\/\" target=\"_blank\" rel=\"noopener\">R&#8217;de MAPE nas\u0131l hesaplan\u0131r<\/a><br \/> <a href=\"https:\/\/statorials.org\/tr\/rdeki-ortalama-mutlak-hata\/\" target=\"_blank\" rel=\"noopener\">R&#8217;de MAD nas\u0131l hesaplan\u0131r<\/a><br \/> <a href=\"https:\/\/statorials.org\/tr\/rdeki-ortalama-mutlak-hata\/\" target=\"_blank\" rel=\"noopener\">R&#8217;de MAE nas\u0131l hesaplan\u0131r<\/a><br \/> <a href=\"https:\/\/statorials.org\/tr\/rde-rmse-nasil-hesaplanir\/\" target=\"_blank\" rel=\"noopener\">R&#8217;de RMSE nas\u0131l hesaplan\u0131r<\/a><br \/> <a href=\"https:\/\/statorials.org\/tr\/rde-mse-nasil-hesaplanir\/\" target=\"_blank\" rel=\"noopener\">R&#8217;de MSE nas\u0131l hesaplan\u0131r<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Modellerin tahmin do\u011frulu\u011funu \u00f6l\u00e7mek i\u00e7in Simetrik Ortalama Mutlak Y\u00fczde Hatas\u0131 (SMAPE) kullan\u0131l\u0131r. A\u015fa\u011f\u0131daki \u015fekilde hesaplan\u0131r: SMAPE = (1\/n) * \u03a3(|tahmin \u2013 ger\u00e7ek| \/ ((|ger\u00e7ek| + |tahmin|)\/2) * 100 Alt\u0131n: \u03a3 \u2013 \u201ctoplam\u201d anlam\u0131na gelen bir sembol n \u2013 \u00f6rneklem b\u00fcy\u00fckl\u00fc\u011f\u00fc ger\u00e7ek \u2013 verilerin ger\u00e7ek de\u011feri tahmin \u2013 verilerin beklenen de\u011feri SMAPE de\u011feri ne kadar k\u00fc\u00e7\u00fck [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"class_list":["post-1631","post","type-post","status-publish","format-standard","hentry","category-rehber"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>R - Statorialsde SMAPE nas\u0131l hesaplan\u0131r<\/title>\n<meta name=\"description\" content=\"Bu e\u011fitimde R&#039;de Simetrik Ortalama Mutlak Y\u00fczde Hatas\u0131n\u0131n (SMAPE) nas\u0131l hesaplanaca\u011f\u0131 \u00f6rneklerle birlikte a\u00e7\u0131klanmaktad\u0131r.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/statorials.org\/tr\/rde-smape\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"R - 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