{"id":1136,"date":"2023-07-27T13:23:25","date_gmt":"2023-07-27T13:23:25","guid":{"rendered":"https:\/\/statorials.org\/tr\/rde-for-dongusu-ic-ice\/"},"modified":"2023-07-27T13:23:25","modified_gmt":"2023-07-27T13:23:25","slug":"rde-for-dongusu-ic-ice","status":"publish","type":"post","link":"https:\/\/statorials.org\/tr\/rde-for-dongusu-ic-ice\/","title":{"rendered":"R'de yuvalanm\u0131\u015f for d\u00f6ng\u00fcs\u00fc nas\u0131l olu\u015fturulur (\u00f6rnekler dahil)"},"content":{"rendered":"

<\/p>\n

\n

\u0130\u00e7 i\u00e7e ge\u00e7mi\u015f bir for d\u00f6ng\u00fcs\u00fc,<\/strong> birden \u00e7ok vekt\u00f6rdeki (veya bir matrisin birden \u00e7ok boyutunda) \u00f6\u011feler \u00fczerinde yineleme yapman\u0131za ve belirli i\u015flemleri ger\u00e7ekle\u015ftirmenize olanak tan\u0131r.<\/span><\/p>\n

R’deki for d\u00f6ng\u00fcs\u00fcn\u00fcn<\/strong> temel yap\u0131s\u0131 \u015f\u00f6yledir:<\/span><\/p>\n

 for<\/span> (i in<\/span> 1:4) {\n  print<\/span> (i)\n}\n\n[1] 1\n[1] 2\n[1] 3\n[1] 4<\/strong><\/pre>\n
 Ve i\u00e7 i\u00e7e ge\u00e7mi\u015f bir for d\u00f6ng\u00fcs\u00fcn\u00fcn<\/strong> temel yap\u0131s\u0131 \u015f\u00f6yledir:<\/span><\/p>\n
 for<\/span> (i in<\/span> 1:4) {\n  for<\/span> (j in<\/span> 1:2) {\n    print<\/span> (i*j)\n  }\n}\n\n[1] 1\n[1] 2\n[1] 2\n[1] 4\n[1] 3\n[1] 6\n[1] 4\n[1] 8<\/strong><\/pre>\n
 Bu e\u011fitimde R’de i\u00e7 i\u00e7e d\u00f6ng\u00fcler olu\u015fturmaya ili\u015fkin baz\u0131 \u00f6rnekler g\u00f6sterilmektedir.<\/span><\/p>\n
 \u00d6rnek 1: R’de Yuvalanm\u0131\u015f For d\u00f6ng\u00fcs\u00fc<\/strong><\/span><\/h3>\n
 A\u015fa\u011f\u0131daki kod, 4×4’l\u00fck bir matrisin de\u011ferlerini doldurmak i\u00e7in i\u00e7 i\u00e7e for d\u00f6ng\u00fcs\u00fcn\u00fcn nas\u0131l kullan\u0131laca\u011f\u0131n\u0131 g\u00f6sterir:<\/span><\/p>\n
 #create matrix\n<\/span>empty_mat <- matrix(nrow= 4<\/span> , ncol= 4<\/span> )\n\n#view empty matrix<\/span>\nempty_mat\n     [,1] [,2] [,3] [,4]\n[1,] NA NA NA NA\n[2,] NA NA NA NA\n[3,] NA NA NA NA\n[4,] NA NA NA NA\n\n#use nested for loop to fill in values of matrix\n<\/span>for<\/span> (i in<\/span> 1:4) {\n  for<\/span> (j in<\/span> 1:4) {\n    empty_mat[i, j] = (i*j)\n  }\n}\n\n#view matrix<\/span>\nempty_mat\n\n     [,1] [,2] [,3] [,4]\n[1,] 1 2 3 4\n[2,] 2 4 6 8\n[3,] 3 6 9 12\n[4,] 4 8 12 16\n<\/span><\/span><\/strong><\/pre>\n
 \u00d6rnek 2: R’de \u0130\u00e7 \u0130\u00e7e For d\u00f6ng\u00fcs\u00fc<\/strong><\/span><\/h3>\n
 A\u015fa\u011f\u0131daki kod, bir veri \u00e7er\u00e7evesindeki her de\u011ferin karesini almak i\u00e7in i\u00e7 i\u00e7e for d\u00f6ng\u00fcs\u00fcn\u00fcn nas\u0131l kullan\u0131laca\u011f\u0131n\u0131 g\u00f6sterir:<\/span><\/p>\n
 #create empty data frame\n<\/span>df <- data.frame(var1=c(1, 7, 4),\n                 var2=c(9, 13, 15))\n\n#view empty data frame<\/span>\ndf\n\n  var1 var2\n1 1 9\n2 7 13\n3 4 15\n\n#use nested for loop to square each value in the data frame\n<\/span>for<\/span> (i in<\/span> 1:nrow(df)) {\n  for<\/span> (j in<\/span> 1:ncol(df)) {\n    df[i, j] = df[i, j]^2\n  }\n}\n\n#view new data frame<\/span>\ndf\n\n  var1 var2\n1 1 81\n2 49 169\n3 16 225<\/span><\/span><\/strong><\/pre>\n
 D\u00f6ng\u00fc hakk\u0131nda bir not<\/strong><\/h3>\n
 Genel olarak, i\u00e7 i\u00e7e d\u00f6ng\u00fcler k\u00fc\u00e7\u00fck veri k\u00fcmeleri veya matrisler \u00fczerinde iyi \u00e7al\u0131\u015f\u0131r, ancak daha b\u00fcy\u00fck verilerle olduk\u00e7a yava\u015f olma e\u011filimindedirler.<\/span><\/p>\n
 B\u00fcy\u00fck veriler i\u00e7in, uygulama i\u015flev ailesi<\/a> \u00e7ok daha h\u0131zl\u0131 olma e\u011filimindedir ve data.table<\/a> paketi, daha b\u00fcy\u00fck veri k\u00fcmelerinde verimli bir \u015fekilde \u00e7al\u0131\u015fan bir\u00e7ok yerle\u015fik i\u015fleve sahiptir.<\/span><\/p>\n
 Ek kaynaklar<\/strong><\/span><\/h3>\n
 R’de s\u00fctun adlar\u0131 \u00fczerinde yineleme nas\u0131l yap\u0131l\u0131r<\/a>
 R’de bir veri \u00e7er\u00e7evesine sat\u0131rlar nas\u0131l eklenir<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
\u0130\u00e7 i\u00e7e ge\u00e7mi\u015f bir for d\u00f6ng\u00fcs\u00fc, birden \u00e7ok vekt\u00f6rdeki (veya bir matrisin birden \u00e7ok boyutunda) \u00f6\u011feler \u00fczerinde yineleme yapman\u0131za ve belirli i\u015flemleri ger\u00e7ekle\u015ftirmenize olanak tan\u0131r. R’deki for d\u00f6ng\u00fcs\u00fcn\u00fcn temel yap\u0131s\u0131 \u015f\u00f6yledir: for (i in 1:4) { print (i) } [1] 1 [1] 2 [1] 3 [1] 4 Ve i\u00e7 i\u00e7e ge\u00e7mi\u015f bir for d\u00f6ng\u00fcs\u00fcn\u00fcn temel […]<\/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-1136","post","type-post","status-publish","format-standard","hentry","category-rehber"],"yoast_head":"\nR'de Yuvalanm\u0131\u015f For D\u00f6ng\u00fcs\u00fc Nas\u0131l Olu\u015fturulur (\u00d6rnekler Dahil)<\/title>\n<meta name=\"description\" content=\"Bu e\u011fitimde R'de i\u00e7 i\u00e7e bir for d\u00f6ng\u00fcs\u00fcn\u00fcn nas\u0131l olu\u015fturulaca\u011f\u0131 birka\u00e7 \u00f6rnekle a\u00e7\u0131klanmaktad\u0131r.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" 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