{"id":4491,"date":"2023-07-10T16:58:21","date_gmt":"2023-07-10T16:58:21","guid":{"rendered":"https:\/\/statorials.org\/tr\/fitdistr-r\/"},"modified":"2023-07-10T16:58:21","modified_gmt":"2023-07-10T16:58:21","slug":"fitdistr-r","status":"publish","type":"post","link":"https:\/\/statorials.org\/tr\/fitdistr-r\/","title":{"rendered":"Da\u011f\u0131t\u0131mlara uyacak \u015fekilde r&#39;de fitdistr() nas\u0131l kullan\u0131l\u0131r?"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Olabilirlik fonksiyonunu maksimuma \u00e7\u0131kararak bir da\u011f\u0131l\u0131m\u0131n parametrelerini tahmin etmek i\u00e7in R&#8217;deki <strong>MASS<\/strong> paketindeki <strong>fitdistr()<\/strong> fonksiyonunu kullanabilirsiniz.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Bu i\u015flev a\u015fa\u011f\u0131daki temel s\u00f6zdizimini kullan\u0131r:<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>fitdistr(x, yo\u011fun e\u011flence, \u2026)<\/strong><\/span><\/p>\n<p> <span style=\"color: #000000;\">Alt\u0131n:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>x<\/strong> : Da\u011f\u0131l\u0131m\u0131n de\u011ferlerini temsil eden say\u0131sal bir vekt\u00f6r<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>yo\u011funfun<\/strong> : parametreleri tahmin etmek i\u00e7in da\u011f\u0131l\u0131m<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\"><strong>Densfun<\/strong> arg\u00fcman\u0131n\u0131n \u015fu potansiyel da\u011f\u0131t\u0131m adlar\u0131n\u0131 kabul etti\u011fini unutmay\u0131n: <strong>beta<\/strong> , <strong>cauchy<\/strong> , <strong>ki-kare<\/strong> , <strong>\u00fcstel<\/strong> , <strong>gamma<\/strong> , <strong>geometrik<\/strong> , <strong>lognormal<\/strong> , <strong>lojistik<\/strong> , <strong>negatif binom<\/strong> , <strong>normal<\/strong> , <strong>Poisson<\/strong> , <strong>t<\/strong> ve <strong>Weibull<\/strong> .<\/span><\/p>\n<p> <span style=\"color: #000000;\">A\u015fa\u011f\u0131daki \u00f6rnekte <strong>fitdistr()<\/strong> fonksiyonunun pratikte nas\u0131l kullan\u0131laca\u011f\u0131 g\u00f6sterilmektedir.<\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>\u00d6rnek: R&#8217;deki da\u011f\u0131l\u0131mlar\u0131 s\u0131\u011fd\u0131rmak i\u00e7in fitdistr() i\u015flevi nas\u0131l kullan\u0131l\u0131r?<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Normal bir da\u011f\u0131l\u0131m izleyen 200 de\u011ferden olu\u015fan bir vekt\u00f6r olu\u015fturmak i\u00e7in R&#8217;de <strong>rnorm()<\/strong> i\u015flevini kulland\u0131\u011f\u0131m\u0131z\u0131 varsayal\u0131m:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#make this example reproducible\n<span style=\"color: #000000;\">set. <span style=\"color: #3366ff;\">seeds<\/span> (1)<\/span>\n\n#generate sample of 200 observations that follows normal dist with mean=10 and sd=3<\/span>\ndata &lt;- rnorm(200, mean=10, sd=3)\n\n<span style=\"color: #008080;\">#view first 6 observations in sample\n<\/span>head(data)\n\n[1] 8.120639 10.550930 7.493114 14.785842 10.988523 7.538595\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Veri de\u011ferlerinin da\u011f\u0131l\u0131m\u0131n\u0131 g\u00f6rselle\u015ftirmek amac\u0131yla bir histogram olu\u015fturmak i\u00e7in <strong>hist()<\/strong> i\u015flevini kullanabiliriz:<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\"><span style=\"color: #000000;\">hist(data, col=' <span style=\"color: #ff0000;\">steelblue<\/span> ')\n<\/span><\/span><\/strong><\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-11442 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/normaldistr1.png\" alt=\"R'de normal bir da\u011f\u0131l\u0131m olu\u015fturun\" width=\"452\" height=\"451\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">Verilerin ger\u00e7ekten normal da\u011f\u0131lm\u0131\u015f g\u00f6r\u00fcnd\u00fc\u011f\u00fcn\u00fc g\u00f6rebiliriz.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Daha sonra bu da\u011f\u0131l\u0131m\u0131n parametrelerini tahmin etmek i\u00e7in <strong>fitdistr()<\/strong> fonksiyonunu kullanabiliriz:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #008000;\">library<\/span> (MASS)\n\n<\/span>#estimate parameters of distribution\n<span style=\"color: #000000;\">fitdistr(data, \u201c <span style=\"color: #ff0000;\">normal<\/span> \u201d)\n\n      mean sd    \n  10.1066189 2.7803148 \n (0.1965979) (0.1390157)\n<\/span><\/span><\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><strong>fitdistr()<\/strong> i\u015flevi, de\u011ferler vekt\u00f6r\u00fcn\u00fcn ortalamas\u0131 <strong>10,1066189<\/strong> ve standart sapmas\u0131 <strong>2,7803148<\/strong> olan normal bir da\u011f\u0131l\u0131m izledi\u011fini tahmin eder.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Ortalama de\u011feri 10 ve standart sapmas\u0131 3 olan verileri <strong>rnorm()<\/strong> fonksiyonunu kullanarak olu\u015fturdu\u011fumuz i\u00e7in bu de\u011ferler \u015fa\u015f\u0131rt\u0131c\u0131 olmasa gerek.<\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>Ek kaynaklar<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">A\u015fa\u011f\u0131daki e\u011fitimlerde R&#8217;de di\u011fer ortak g\u00f6revlerin nas\u0131l ger\u00e7ekle\u015ftirilece\u011fi a\u00e7\u0131klanmaktad\u0131r:<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/tr\/normal-dagilim-ryi-cizin\/\" target=\"_blank\" rel=\"noopener noreferrer\">R&#8217;de normal da\u011f\u0131l\u0131m nas\u0131l \u00e7izilir<\/a><br \/> <a href=\"https:\/\/statorials.org\/tr\/rde-normal-bir-dagilim-olusturmak\/\" target=\"_blank\" rel=\"noopener\">R&#8217;de normal da\u011f\u0131l\u0131m nas\u0131l olu\u015fturulur?<\/a><br \/><a href=\"https:\/\/statorials.org\/tr\/shapiro-wilk-testi-r\/\" target=\"_blank\" rel=\"noopener noreferrer\">R&#8217;de normallik i\u00e7in Shapiro-Wilk testi nas\u0131l yap\u0131l\u0131r<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Olabilirlik fonksiyonunu maksimuma \u00e7\u0131kararak bir da\u011f\u0131l\u0131m\u0131n parametrelerini tahmin etmek i\u00e7in R&#8217;deki MASS paketindeki fitdistr() fonksiyonunu kullanabilirsiniz. Bu i\u015flev a\u015fa\u011f\u0131daki temel s\u00f6zdizimini kullan\u0131r: fitdistr(x, yo\u011fun e\u011flence, \u2026) Alt\u0131n: x : Da\u011f\u0131l\u0131m\u0131n de\u011ferlerini temsil eden say\u0131sal bir vekt\u00f6r yo\u011funfun : parametreleri tahmin etmek i\u00e7in da\u011f\u0131l\u0131m Densfun arg\u00fcman\u0131n\u0131n \u015fu potansiyel da\u011f\u0131t\u0131m adlar\u0131n\u0131 kabul etti\u011fini unutmay\u0131n: beta , cauchy [&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-4491","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>Da\u011f\u0131t\u0131mlara uyacak \u015fekilde R&#039;de fitdistr() nas\u0131l kullan\u0131l\u0131r - 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