{"id":17596,"date":"2025-04-09T03:45:15","date_gmt":"2025-04-09T00:45:15","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/veri-on-isleme-teknikleri-tam-bir-rehber\/"},"modified":"2025-04-09T03:45:15","modified_gmt":"2025-04-09T00:45:15","slug":"veri-on-isleme-teknikleri-tam-bir-rehber","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/veri-on-isleme-teknikleri-tam-bir-rehber\/","title":{"rendered":"Veri \u00d6n \u0130\u015fleme Teknikleri: Tam Bir Rehber"},"content":{"rendered":"<p><body><\/p>\n<p>Veri \u00d6n \u0130\u015fleme Teknikleri: Tam Bir Rehber<\/p>\n<p>Veri \u00f6n i\u015fleme, makine \u00f6\u011frenmesi ve veri analizi projelerinin ba\u015far\u0131s\u0131 i\u00e7in olduk\u00e7a kritik bir a\u015famad\u0131r.  Ham verinin, modelleme a\u015famas\u0131 i\u00e7in uygun hale getirilmesi, bu s\u00fcrecin temelini olu\u015fturur.  <b>Do\u011fru veri \u00f6n i\u015fleme teknikleri ile;<\/b> daha do\u011fru ve g\u00fcvenilir sonu\u00e7lar elde edilirken, modelin performans\u0131 da \u00f6nemli \u00f6l\u00e7\u00fcde art\u0131r\u0131labilir.  Bu rehberde, yayg\u0131n veri \u00f6n i\u015fleme tekniklerini ad\u0131m ad\u0131m inceleyece\u011fiz.<\/p>\n<h2>Veri Temizleme (Data Cleaning)<\/h2>\n<p>Veri temizleme,  g\u00fcr\u00fclt\u00fcl\u00fc, eksik veya tutars\u0131z verilerin ele al\u0131nmas\u0131n\u0131 i\u00e7erir. Bu s\u00fcre\u00e7, veri kalitesini iyile\u015ftirmek ve modelin g\u00fcvenilirli\u011fini art\u0131rmak i\u00e7in son derece \u00f6nemlidir. \u00d6rne\u011fin, eksik veriler i\u00e7in ortalama, medyan veya mod de\u011ferleri kullan\u0131labilir.  Ayr\u0131ca, ayk\u0131r\u0131 de\u011ferler (outliers) tespit edilip, gerekli d\u00fczenlemeler yap\u0131labilir. Ayk\u0131r\u0131 de\u011ferlerin tespiti i\u00e7in \u00e7e\u015fitli y\u00f6ntemler kullan\u0131l\u0131r;  \u00f6rne\u011fin, kutupsal grafikler (box plots)  veya standart sapma analizi kullan\u0131labilir.  Baz\u0131 durumlarda ayk\u0131r\u0131 de\u011ferler, veri setinden tamamen \u00e7\u0131kar\u0131labilir veya  d\u00f6n\u00fc\u015ft\u00fcr\u00fclerek (\u00f6rne\u011fin, log d\u00f6n\u00fc\u015f\u00fcm\u00fc) veri setinde tutulabilir. <\/p>\n<h2>Veri D\u00f6n\u00fc\u015f\u00fcm\u00fc (Data Transformation)<\/h2>\n<p>Veri d\u00f6n\u00fc\u015f\u00fcm\u00fc, verinin \u00f6l\u00e7e\u011fini veya da\u011f\u0131l\u0131m\u0131n\u0131 de\u011fi\u015ftirerek modelin performans\u0131n\u0131 iyile\u015ftirmeyi ama\u00e7lar. Yayg\u0131n d\u00f6n\u00fc\u015f\u00fcm teknikleri \u015funlard\u0131r:<\/p>\n<ul>\n<li><b>Normalizasyon (Normalization):<\/b> Veri de\u011ferlerini 0 ile 1 aras\u0131nda \u00f6l\u00e7eklendirme i\u015flemidir.  Min-max normalizasyonu yayg\u0131n bir y\u00f6ntemdir.<\/li>\n<li><b>Standardizasyon (Standardization):<\/b> Veri de\u011ferlerinin ortalamas\u0131 0 ve standart sapmas\u0131 1 olacak \u015fekilde \u00f6l\u00e7eklendirilmesini sa\u011flar. Z-score standardizasyonu s\u0131kl\u0131kla kullan\u0131l\u0131r.<\/li>\n<li><b>Log d\u00f6n\u00fc\u015f\u00fcm\u00fc:<\/b> \u00c7arp\u0131k da\u011f\u0131l\u0131ml\u0131 verilerin simetrik hale getirilmesinde etkilidir.  \u00d6zellikle pozitif de\u011ferli veriler i\u00e7in uygundur.<\/li>\n<\/ul>\n<h2>Eksik Veri ile Ba\u015fa \u00c7\u0131kma<\/h2>\n<p>Ger\u00e7ek d\u00fcnya veri setlerinde eksik veriler s\u0131kl\u0131kla kar\u015f\u0131la\u015f\u0131l\u0131r. Eksik verilerle ba\u015fa \u00e7\u0131kmak i\u00e7in \u00e7e\u015fitli y\u00f6ntemler vard\u0131r:<\/p>\n<ul>\n<li><b>Silme:<\/b> Eksik veri i\u00e7eren sat\u0131r veya s\u00fctunlar\u0131n veri setinden silinmesi. Ancak bu y\u00f6ntem, \u00f6zellikle eksik verilerin oran\u0131 y\u00fcksekse, bilgi kayb\u0131na yol a\u00e7abilir.<\/li>\n<li><b>De\u011fer Atama:<\/b> Eksik de\u011ferlere ortalama, medyan, mod veya di\u011fer istatistiksel \u00f6l\u00e7\u00fctler atanmas\u0131.  Bu y\u00f6ntem, eksik verilerin da\u011f\u0131l\u0131m\u0131 hakk\u0131nda bilgi sahibi olmak \u015fart\u0131yla kullan\u0131labilir.  Makine \u00f6\u011frenmesi modelleri de eksik de\u011fer tahmini i\u00e7in kullan\u0131labilir. <\/li>\n<li><b>Tahmine Dayal\u0131 Doldurma (Imputation):<\/b>  Eksik de\u011ferlerin, mevcut veriler kullan\u0131larak tahmin edilmesi.  K-Nearest Neighbors (KNN)  veya regresyon modelleri gibi y\u00f6ntemler kullan\u0131labilir.<\/li>\n<\/ul>\n<h2>Ayk\u0131r\u0131 De\u011ferlerin (Outliers) \u0130\u015flenmesi<\/h2>\n<p>Ayk\u0131r\u0131 de\u011ferler, veri setindeki di\u011fer de\u011ferlerden \u00f6nemli \u00f6l\u00e7\u00fcde farkl\u0131 olan de\u011ferlerdir. Bu de\u011ferler, modelin performans\u0131n\u0131 olumsuz etkileyebilir. Ayk\u0131r\u0131 de\u011ferlerle ba\u015fa \u00e7\u0131kmak i\u00e7in:<\/p>\n<ul>\n<li><b>Silme:<\/b>  Ayk\u0131r\u0131 de\u011ferleri veri setinden silmek. Ancak bu y\u00f6ntem, \u00f6zellikle az say\u0131da veri noktas\u0131 varsa, bilgi kayb\u0131na neden olabilir.<\/li>\n<li><b>D\u00f6n\u00fc\u015ft\u00fcrme:<\/b>  Log d\u00f6n\u00fc\u015f\u00fcm\u00fc gibi d\u00f6n\u00fc\u015f\u00fcm y\u00f6ntemleri kullan\u0131larak ayk\u0131r\u0131 de\u011ferlerin etkisini azaltmak.<\/li>\n<li><b>Kaplama (Capping):<\/b> Ayk\u0131r\u0131 de\u011ferleri, belirli bir e\u015fik de\u011fere g\u00f6re s\u0131n\u0131rlamak. \u00d6rne\u011fin, ayk\u0131r\u0131 de\u011ferleri belirli bir y\u00fczdelik dilimin \u00fcst veya alt s\u0131n\u0131r\u0131na e\u015fitlemek.<\/li>\n<\/ul>\n<h2>Veri Azaltma (Feature Reduction)<\/h2>\n<p>Veri setinde \u00e7ok say\u0131da \u00f6zellik (\u00f6zellik) olmas\u0131, modelin karma\u015f\u0131kl\u0131\u011f\u0131n\u0131 art\u0131rabilir ve performans\u0131n\u0131 d\u00fc\u015f\u00fcrebilir.  Bu nedenle, \u00f6zellik azaltma teknikleri kullan\u0131labilir.  \u00d6rnek olarak, ana bile\u015fen analizi (PCA) ve \u00f6zellik se\u00e7imi y\u00f6ntemleri verilebilir.  <\/p>\n<p>Veri \u00f6n i\u015fleme, ba\u015far\u0131l\u0131 bir makine \u00f6\u011frenmesi projesinin temel ta\u015flar\u0131ndan biridir.  Yukar\u0131da anlat\u0131lan teknikleri do\u011fru ve dikkatli bir \u015fekilde uygulayarak, veri setinizin kalitesini art\u0131rabilir ve modelinizin performans\u0131n\u0131 optimize edebilirsiniz.  Daha fazla bilgi i\u00e7in <a href=\"https:\/\/fatihsoysal.com\">fatihsoysal.com<\/a> adresini ziyaret edebilirsiniz.  Ayr\u0131ca,  <a href=\"https:\/\/dev.to\/the_medicaltreasure_cf3a\/what-are-common-techniques-for-data-preprocessing-2ddj\">burada<\/a> verilen \u0130ngilizce kayna\u011fa da g\u00f6z atabilirsiniz.<\/p>\n<h3>#Etiketler<\/h3>\n<p>#Veri \u00d6n \u0130\u015fleme #Veri Temizleme #Veri D\u00f6n\u00fc\u015f\u00fcm\u00fc #Makine \u00d6\u011frenmesi #Veri Analizi #Eksik Veri #Ayk\u0131r\u0131 De\u011fer #Normalizasyon #Standardizasyon #\u00d6zellik Azaltma<\/p>\n<p><\/body><br \/>\n<\/html><\/p>\n","protected":false},"excerpt":{"rendered":"Veri \u00d6n \u0130\u015fleme Teknikleri: Tam Bir Rehber Veri \u00f6n i\u015fleme, makine \u00f6\u011frenmesi ve veri analizi projelerinin ba\u015far\u0131s\u0131 i\u00e7in&hellip;","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_page_header_type":"","csco_page_load_nextpost":"","csco_page_subscribe_form":"","csco_page_contact_form":"","footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-17596","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-genel","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.5 (Yoast SEO v25.3.1) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Veri \u00d6n \u0130\u015fleme Teknikleri: Tam Bir Rehber<\/title>\n<meta name=\"description\" content=\"Veri \u00f6n i\u015fleme, makine \u00f6\u011frenmesi ve veri analizi projelerinin ba\u015far\u0131s\u0131 i\u00e7in olduk\u00e7a kritik bir a\u015famad\u0131r. 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