{"id":3633,"date":"2023-07-16T10:37:23","date_gmt":"2023-07-16T10:37:23","guid":{"rendered":"https:\/\/statorials.org\/tr\/dosyanin-var-olup-olmadigini-kontrol-edin\/"},"modified":"2023-07-16T10:37:23","modified_gmt":"2023-07-16T10:37:23","slug":"dosyanin-var-olup-olmadigini-kontrol-edin","status":"publish","type":"post","link":"https:\/\/statorials.org\/tr\/dosyanin-var-olup-olmadigini-kontrol-edin\/","title":{"rendered":"Dosyan\u0131n r'de olup olmad\u0131\u011f\u0131 nas\u0131l kontrol edilir (\u00f6rneklerle)"},"content":{"rendered":"

<\/p>\n

\n

R’deki mevcut \u00e7al\u0131\u015fma dizininizde bir dosyan\u0131n bulunup bulunmad\u0131\u011f\u0131n\u0131 kontrol etmek i\u00e7in a\u015fa\u011f\u0131daki temel s\u00f6zdizimini kullanabilirsiniz:<\/span><\/p>\n

 file. exists<\/span> (' my_data.csv ')<\/span><\/span><\/strong><\/pre>\n
 Bu i\u015flev, dosya varsa TRUE<\/strong> , yoksa FALSE<\/strong> de\u011ferini d\u00f6nd\u00fcr\u00fcr.<\/span><\/p>\n
 R’de bir dosyay\u0131 yaln\u0131zca mevcutsa okumak i\u00e7in if else ifadesini de kullanabilirsiniz:<\/span><\/p>\n
 data <- ' my_data.csv<\/span> '\n\nif(file. exists<\/span> (data)){<\/strong>\ndf <- read. csv<\/span> (data)<\/strong>\n} else {<\/strong>\nprint<\/span> (' Does not exist<\/span> ')<\/strong>\n}<\/strong><\/pre>\n
 A\u015fa\u011f\u0131daki \u00f6rnekte bu fonksiyonlar\u0131n pratikte nas\u0131l kullan\u0131laca\u011f\u0131 g\u00f6sterilmektedir.<\/span><\/p>\n
 \u00d6rnek: dosyan\u0131n R’de olup olmad\u0131\u011f\u0131n\u0131 kontrol edin<\/strong><\/span><\/h2>\n
 Diyelim ki R’deki mevcut \u00e7al\u0131\u015fma dizinim,<\/a> \u00fc\u00e7 CSV dosyas\u0131 i\u00e7eren test_data<\/strong> adl\u0131 bir klas\u00f6rd\u00fcr:<\/span><\/span> <\/p>\n
\"\"<\/p>\n
 \u00c7al\u0131\u015fma dizinindeki her dosyan\u0131n ad\u0131n\u0131 listelemek i\u00e7in list.files()<\/strong> i\u015flevini kullanabilirim:<\/span><\/p>\n
 #display the names of every file in current working directory\n<\/span>list. files<\/span> ()\n[1] \"my_data.csv\" \"my_new_data.csv\" \"some_old_data.csv\"\n<\/strong><\/pre>\n
 Belirli bir dosyan\u0131n ge\u00e7erli \u00e7al\u0131\u015fma dizininde bulunup bulunmad\u0131\u011f\u0131n\u0131 kontrol etmek i\u00e7in file.exists()<\/strong> i\u015flevini kullanabilirim:<\/span><\/p>\n
 #check if file 'my_data.csv' exists in current working directory\n<\/span>file. exists<\/span> (' my_data.csv<\/span> ')\n\n[1] TRUE<\/strong><\/pre>\n
 \u0130\u015flev, ‘my_data.csv’ dosyas\u0131n\u0131n ger\u00e7ekten ge\u00e7erli \u00e7al\u0131\u015fma dizininde var oldu\u011funu bize bildiren TRUE<\/strong> de\u011ferini d\u00f6nd\u00fcr\u00fcr.<\/span><\/p>\n
 Daha sonra bir dosyay\u0131 yaln\u0131zca mevcutsa i\u00e7e aktarmak i\u00e7in a\u015fa\u011f\u0131daki if else<\/strong> ifadesini kullanabiliriz:<\/span><\/p>\n
 #define file name<\/span>\ndata <- ' my_data.csv<\/span> '\n\n#import file only if it exists<\/span>\nif(file. exists<\/span> (data)){<\/strong>\ndf <- read. csv<\/span> (data)<\/strong>\n} else {<\/strong>\nprint<\/span> (' Does not exist<\/span> ')<\/strong>\n}\n\n#view contents of CSV file<\/span>\ndf\n\n  team points assists\n1 to 14 4\n2 B 26 7\n3 C 29 8\n4 D 20 3\n<\/strong><\/pre>\n
 Dosya mevcut oldu\u011fundan ba\u015far\u0131yla i\u00e7e aktarabiliriz.<\/span><\/p>\n
 Ancak var olmayan bir dosyay\u0131 i\u00e7e aktarmaya \u00e7al\u0131\u015ft\u0131\u011f\u0131m\u0131z\u0131 varsayal\u0131m:<\/span><\/p>\n
 #define file name<\/span>\ndata <- ' this_data.csv<\/span> '\n\n#import file only if it exists<\/span>\nif(file. exists<\/span> (data)){<\/strong>\ndf <- read. csv<\/span> (data)<\/strong>\n} else {<\/strong>\nprint<\/span> (' Does not exist<\/span> ')<\/strong>\n}\n\n[1] \u201cDoes not exist\u201d\n<\/strong><\/pre>\n
 This_data.csv<\/strong> adl\u0131 bir dosyan\u0131n mevcut \u00e7al\u0131\u015fma dizininde bulunmad\u0131\u011f\u0131n\u0131 bildiren “Mevcut de\u011fil” mesaj\u0131n\u0131 al\u0131yoruz.<\/span><\/p>\n
 Ek kaynaklar<\/strong><\/span><\/h2>\n
 A\u015fa\u011f\u0131daki e\u011fitimlerde R’deki di\u011fer yayg\u0131n i\u015flevlerin nas\u0131l kullan\u0131laca\u011f\u0131 a\u00e7\u0131klanmaktad\u0131r:<\/span><\/p>\n
 R’de Zip dosyalar\u0131 nas\u0131l okunur<\/a>
 CSV dosyalar\u0131 R’ye nas\u0131l aktar\u0131l\u0131r<\/a>
 Excel dosyalar\u0131 R’ye nas\u0131l aktar\u0131l\u0131r<\/a>
 R’de dosyalar nas\u0131l yeniden adland\u0131r\u0131l\u0131r<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
R’deki mevcut \u00e7al\u0131\u015fma dizininizde bir dosyan\u0131n bulunup bulunmad\u0131\u011f\u0131n\u0131 kontrol etmek i\u00e7in a\u015fa\u011f\u0131daki temel s\u00f6zdizimini kullanabilirsiniz: file. exists (‘ my_data.csv ‘) Bu i\u015flev, dosya varsa TRUE , yoksa FALSE de\u011ferini d\u00f6nd\u00fcr\u00fcr. R’de bir dosyay\u0131 yaln\u0131zca mevcutsa okumak i\u00e7in if else ifadesini de kullanabilirsiniz: data <- ‘ my_data.csv ‘ if(file. exists (data)){ df <- read. csv (data) […]<\/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-3633","post","type-post","status-publish","format-standard","hentry","category-rehber"],"yoast_head":"\nR'de bir dosyan\u0131n var olup olmad\u0131\u011f\u0131 nas\u0131l kontrol edilir (\u00f6rneklerle) \u2013 Statorials<\/title>\n<meta name=\"description\" content=\"Bu e\u011fitimde, bir \u00f6rnekle R'deki bir klas\u00f6rde bir dosyan\u0131n bulunup bulunmad\u0131\u011f\u0131n\u0131n nas\u0131l kontrol edilece\u011fi a\u00e7\u0131klanmaktad\u0131r.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link 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