{"id":2274,"date":"2023-07-22T23:48:35","date_gmt":"2023-07-22T23:48:35","guid":{"rendered":"https:\/\/statorials.org\/tr\/dengeli-hassas-python-sklearn\/"},"modified":"2023-07-22T23:48:35","modified_gmt":"2023-07-22T23:48:35","slug":"dengeli-hassas-python-sklearn","status":"publish","type":"post","link":"https:\/\/statorials.org\/tr\/dengeli-hassas-python-sklearn\/","title":{"rendered":"Python&#39;da sklearn kullan\u0131larak dengeli hassasiyet nas\u0131l hesaplan\u0131r"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\"><strong>Dengeli do\u011fruluk,<\/strong> bir <a href=\"https:\/\/statorials.org\/tr\/regresyon-ve-siniflandirma\/\" target=\"_blank\" rel=\"noopener\">s\u0131n\u0131fland\u0131rma modelinin<\/a> performans\u0131n\u0131 de\u011ferlendirmek i\u00e7in kullanabilece\u011fimiz bir \u00f6l\u00e7\u00fcmd\u00fcr.<\/span><\/p>\n<p> <span style=\"color: #000000;\">A\u015fa\u011f\u0131daki \u015fekilde hesaplan\u0131r:<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>Dengeli Do\u011fruluk<\/strong> = (Hassasiyet + \u00d6zg\u00fcnl\u00fck) \/ 2<\/span><\/p>\n<p> <span style=\"color: #000000;\">Alt\u0131n:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>Hassasiyet<\/strong> : &#8220;Ger\u00e7ek pozitif oran&#8221; &#8211; modelin tespit edebildi\u011fi pozitif vakalar\u0131n y\u00fczdesi.<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>\u00d6zg\u00fcll\u00fck<\/strong> : &#8220;Ger\u00e7ek negatif oran&#8221; \u2013 modelin tespit edebildi\u011fi negatif vakalar\u0131n y\u00fczdesi.<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">Bu \u00f6l\u00e7\u00fcm \u00f6zellikle iki s\u0131n\u0131f dengesiz oldu\u011funda, yani bir s\u0131n\u0131f\u0131n di\u011ferinden \u00e7ok daha fazla g\u00f6r\u00fcnd\u00fc\u011f\u00fc durumlarda kullan\u0131\u015fl\u0131d\u0131r.<\/span><\/p>\n<p> <span style=\"color: #000000;\">\u00d6rne\u011fin, bir spor analistinin 400 farkl\u0131 \u00fcniversite basketbol oyuncusunun NBA&#8217;e al\u0131n\u0131p al\u0131nmayaca\u011f\u0131n\u0131 tahmin etmek i\u00e7in <a href=\"https:\/\/statorials.org\/tr\/lojistik-regresyon-1\/\" target=\"_blank\" rel=\"noopener\">lojistik regresyon modeli<\/a> kulland\u0131\u011f\u0131n\u0131 varsayal\u0131m.<\/span><\/p>\n<p> <span style=\"color: #000000;\">A\u015fa\u011f\u0131daki kar\u0131\u015f\u0131kl\u0131k matrisi, modelin yapt\u0131\u011f\u0131 tahminleri \u00f6zetlemektedir:<\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-20693 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/equilibre1.png\" alt=\"\" width=\"430\" height=\"135\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">Modelin dengeli do\u011frulu\u011funu hesaplamak i\u00e7in \u00f6ncelikle duyarl\u0131l\u0131\u011f\u0131 ve \u00f6zg\u00fcll\u00fc\u011f\u00fc hesaplayaca\u011f\u0131z:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>Hassasiyet<\/strong> : \u201cGer\u00e7ek pozitif oran\u201d = 15 \/ (15 + 5) = 0,75<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>\u00d6zg\u00fcll\u00fck<\/strong> : \u201cGer\u00e7ek negatif oran\u201d = 375 \/ (375 + 5) = 0,9868<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">Daha sonra dengeli hassasiyeti a\u015fa\u011f\u0131daki gibi hesaplayabiliriz:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">Dengeli Do\u011fruluk = (Hassasiyet + \u00d6zg\u00fcll\u00fck) \/ 2<\/span><\/li>\n<li> <span style=\"color: #000000;\">Dengeli do\u011fruluk = (0,75 + 9868) \/ 2<\/span><\/li>\n<li> <span style=\"color: #000000;\">Dengeli do\u011fruluk = 0,8684<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">Modelin dengeli do\u011frulu\u011fu <strong>0,8684<\/strong> olarak \u00e7\u0131k\u0131yor.<\/span><\/p>\n<p> <span style=\"color: #000000;\">A\u015fa\u011f\u0131daki \u00f6rnek, Python&#8217;daki <strong>sklearn<\/strong> k\u00fct\u00fcphanesindeki <strong>Balanced_accuracy_score()<\/strong> i\u015flevini kullanarak bu \u00f6zel senaryo i\u00e7in dengeli do\u011frulu\u011fun nas\u0131l hesaplanaca\u011f\u0131n\u0131 g\u00f6sterir.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>\u00d6rnek: Python&#8217;da Dengeli Hassasiyetin Hesaplanmas\u0131<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">A\u015fa\u011f\u0131daki kod, tahmin edilen s\u0131n\u0131flar\u0131n bir dizisinin ve ger\u00e7ek s\u0131n\u0131flar\u0131n bir dizisinin nas\u0131l tan\u0131mlanaca\u011f\u0131n\u0131 ve ard\u0131ndan Python&#8217;da bir modelin dengeli do\u011frulu\u011funun nas\u0131l hesaplanaca\u011f\u0131n\u0131 g\u00f6sterir:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\">import<\/span> numpy <span style=\"color: #008000;\">as<\/span> np\n<span style=\"color: #008000;\">from<\/span> sklearn. <span style=\"color: #3366ff;\">metrics<\/span> <span style=\"color: #008000;\">import<\/span> balanced_accuracy_score\n\n<span style=\"color: #008080;\">#define array of actual classes\n<\/span>actual = np. <span style=\"color: #3366ff;\">repeat<\/span> ([1, 0], repeats=[20, 380])\n\n<span style=\"color: #008080;\">#define array of predicted classes\n<\/span>pred = np. <span style=\"color: #3366ff;\">repeat<\/span> ([1, 0, 1, 0], repeats=[15, 5, 5, 375])\n\n<span style=\"color: #008080;\">#calculate balanced accuracy score\n<\/span>balanced_accuracy_score(actual, pred)\n\n0.868421052631579<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Dengeli hassasiyet <strong>0,8684&#8217;t\u00fcr<\/strong> . Bu, daha \u00f6nce manuel olarak hesaplad\u0131\u011f\u0131m\u0131z de\u011ferle e\u015fle\u015fiyor.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>Not<\/strong> : <strong>Balanced_accuracy_score()<\/strong> i\u015flevine ili\u015fkin t\u00fcm belgeleri <a href=\"https:\/\/scikit-learn.org\/stable\/modules\/generated\/sklearn.metrics.balanced_accuracy_score.html\" target=\"_blank\" rel=\"noopener\">burada<\/a> bulabilirsiniz.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Ek kaynaklar<\/strong><\/span><\/h3>\n<p> <a href=\"https:\/\/statorials.org\/tr\/dengeli-hassasiyet\/\" target=\"_blank\" rel=\"noopener\">Dengeli Do\u011frulu\u011fa Giri\u015f<\/a><br \/> <a href=\"https:\/\/statorials.org\/tr\/lojistik-regresyon-pitonu\/\" target=\"_blank\" rel=\"noopener\">Python&#8217;da Lojistik Regresyon Nas\u0131l Ger\u00e7ekle\u015ftirilir<\/a><br \/> <a href=\"https:\/\/statorials.org\/tr\/pythonda-f1-puani\/\" target=\"_blank\" rel=\"noopener\">Python&#8217;da F1 puan\u0131 nas\u0131l hesaplan\u0131r<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Dengeli do\u011fruluk, bir s\u0131n\u0131fland\u0131rma modelinin performans\u0131n\u0131 de\u011ferlendirmek i\u00e7in kullanabilece\u011fimiz bir \u00f6l\u00e7\u00fcmd\u00fcr. A\u015fa\u011f\u0131daki \u015fekilde hesaplan\u0131r: Dengeli Do\u011fruluk = (Hassasiyet + \u00d6zg\u00fcnl\u00fck) \/ 2 Alt\u0131n: Hassasiyet : &#8220;Ger\u00e7ek pozitif oran&#8221; &#8211; modelin tespit edebildi\u011fi pozitif vakalar\u0131n y\u00fczdesi. \u00d6zg\u00fcll\u00fck : &#8220;Ger\u00e7ek negatif oran&#8221; \u2013 modelin tespit edebildi\u011fi negatif vakalar\u0131n y\u00fczdesi. Bu \u00f6l\u00e7\u00fcm \u00f6zellikle iki s\u0131n\u0131f dengesiz oldu\u011funda, yani [&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-2274","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>Python&#039;da sklearn kullan\u0131larak dengeli hassasiyet nas\u0131l hesaplan\u0131r - Statorials<\/title>\n<meta name=\"description\" content=\"Bu e\u011fitimde, Python&#039;da sklearn k\u00fct\u00fcphanesindeki i\u015flevler kullan\u0131larak bir s\u0131n\u0131fland\u0131rma modelinin dengeli do\u011frulu\u011funun nas\u0131l hesaplanaca\u011f\u0131 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\/dengeli-hassas-python-sklearn\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Python&#039;da sklearn kullan\u0131larak dengeli hassasiyet nas\u0131l hesaplan\u0131r - 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