{"id":1542,"date":"2023-07-25T23:14:40","date_gmt":"2023-07-25T23:14:40","guid":{"rendered":"https:\/\/statorials.org\/tr\/altman-grafigini-soldur\/"},"modified":"2023-07-25T23:14:40","modified_gmt":"2023-07-25T23:14:40","slug":"altman-grafigini-soldur","status":"publish","type":"post","link":"https:\/\/statorials.org\/tr\/altman-grafigini-soldur\/","title":{"rendered":"R'de bland-altman grafi\u011fi nas\u0131l olu\u015fturulur (ad\u0131m ad\u0131m)"},"content":{"rendered":"

<\/p>\n

\n

Bland-Altman grafi\u011fi,<\/a> iki farkl\u0131 alet veya iki farkl\u0131 \u00f6l\u00e7\u00fcm tekni\u011fi aras\u0131ndaki \u00f6l\u00e7\u00fcm farklar\u0131n\u0131 g\u00f6rselle\u015ftirmek i\u00e7in kullan\u0131l\u0131r.<\/span><\/p>\n

Ayn\u0131 kavram\u0131 \u00f6l\u00e7mede iki ara\u00e7 veya tekni\u011fin ne kadar benzer oldu\u011funu belirlemek a\u00e7\u0131s\u0131ndan faydal\u0131d\u0131r.<\/span><\/p>\n

Bu e\u011fitimde, R’de bir Bland-Altman grafi\u011finin nas\u0131l olu\u015fturulaca\u011f\u0131na ili\u015fkin ad\u0131m ad\u0131m bir \u00f6rnek sunulmaktad\u0131r.<\/span><\/p>\n

1. Ad\u0131m: Verileri olu\u015fturun<\/strong><\/span><\/h3>\n

Bir biyolo\u011fun, 20 farkl\u0131 kurba\u011fadan olu\u015fan ayn\u0131 grubun a\u011f\u0131rl\u0131\u011f\u0131n\u0131 gram cinsinden \u00f6l\u00e7mek i\u00e7in iki farkl\u0131 alet (A ve B) kulland\u0131\u011f\u0131n\u0131 varsayal\u0131m.<\/span><\/p>\n

Her kurba\u011fan\u0131n, her alet taraf\u0131ndan \u00f6l\u00e7\u00fclen a\u011f\u0131rl\u0131\u011f\u0131n\u0131 temsil eden, R’de a\u015fa\u011f\u0131daki veri \u00e7er\u00e7evesini olu\u015fturaca\u011f\u0131z:<\/span><\/p>\n

 #create data<\/span>\ndf <- data. frame<\/span> (A=c(5, 5, 5, 6, 6, 7, 7, 7, 8, 8, 9,\n                     10, 11, 13, 14, 14, 15, 18, 22, 25),\n                 B=c(4, 4, 5, 5, 5, 7, 8, 6, 9, 7, 7, 11,\n                     13, 13, 12, 13, 14, 19, 19, 24))\n\n#view first six rows of data\n<\/span>head(df)\n\n  AB\n1 5 4\n2 5 4\n3 5 5\n4 6 5\n5 6 5\n6 7 7<\/strong><\/pre>\n
 Ad\u0131m 2: \u00d6l\u00e7\u00fcmlerdeki fark\u0131 hesaplay\u0131n<\/strong><\/span><\/h3>\n
 Daha sonra, veri \u00e7er\u00e7evesinde her kurba\u011fan\u0131n ortalama \u00f6l\u00e7\u00fcm\u00fcn\u00fc ve \u00f6l\u00e7\u00fcmler aras\u0131ndaki fark\u0131 i\u00e7eren iki yeni s\u00fctun olu\u015fturaca\u011f\u0131z:<\/span><\/p>\n
 #create new column for average measurement<\/span>\ndf$avg <- rowMeans(df) \n<\/span>\n#create new column for difference in measurements\ndf$diff <- df$A - df$B<\/span><\/span>\n\n#view first six rows of data\n<\/span>head(df)\n\n  AB avg diff\n1 5 4 4.5 1\n2 5 4 4.5 1\n3 5 5 5.0 0\n4 6 5 5.5 1\n5 6 5 5.5 1\n6 7 7 7.0 0\n<\/strong><\/pre>\n
 Ad\u0131m 3: Ortalama fark\u0131 ve g\u00fcven aral\u0131\u011f\u0131n\u0131 hesaplay\u0131n<\/strong><\/span><\/h3>\n
 Daha sonra, iki enstr\u00fcman aras\u0131ndaki \u00f6l\u00e7\u00fcmlerdeki ortalama fark\u0131 ve ortalama fark i\u00e7in %95 g\u00fcven aral\u0131\u011f\u0131n\u0131n \u00fcst ve alt s\u0131n\u0131rlar\u0131n\u0131 hesaplayaca\u011f\u0131z:<\/span><\/p>\n
 #find average difference<\/span>\nmean_diff <- mean(df$diff)\n\nmean_diff\n\n[1] 0.5\n<\/span>\n#find lower 95% confidence interval limits\nlower <- mean_diff - 1.96*sd(df$diff)<\/span>\n\nlower\n\n[1] -1.921465\n<\/span>\n#find upper 95% confidence interval limits\nupper <- mean_diff + 1.96*sd(df$diff)<\/span>\n\nupper<\/span>\n\n[1] 2.921465\n<\/span><\/span><\/strong><\/pre>\n
 Ortalama fark 0,5<\/strong> olarak ortaya \u00e7\u0131k\u0131yor ve ortalama fark i\u00e7in %95 g\u00fcven aral\u0131\u011f\u0131 [-1,921, 2,921]<\/strong> oluyor.<\/span><\/p>\n
 Ad\u0131m 4: Bland-Altman Grafi\u011fini Olu\u015fturun<\/strong><\/span><\/h3>\n
 Daha sonra, ggplot2<\/a> veri g\u00f6rselle\u015ftirme paketini kullanarak bir Bland-Altman grafi\u011fi olu\u015fturmak i\u00e7in a\u015fa\u011f\u0131daki kodu kullanaca\u011f\u0131z:<\/span><\/span> <\/p>\n
 #load ggplot2\n<\/span><\/span>library<\/span> (ggplot2)\n\n#create Bland-Altman plot\n<\/span>ggplot(df, aes<\/span> (x = avg, y = diff)) +\n  geom_point(size=2) +\n  geom_hline(yintercept = mean_diff) +\n  geom_hline(yintercept = lower, color = \" red<\/span> \", linetype=\" dashed<\/span> \") +\n  geom_hline(yintercept = upper, color = \" red<\/span> \", linetype=\" dashed<\/span> \") +\n  ggtitle(\" Bland-Altman Plot<\/span> \") +\n  ylab(\" Difference Between Measurements<\/span> \") +\n  xlab(\" Average Measurement<\/span> \")<\/span><\/strong> <\/pre>\n
\"R'deki<\/p>\n
 Grafi\u011fin x ekseni iki aletin ortalama \u00f6l\u00e7\u00fcm\u00fcn\u00fc, y ekseni ise iki alet aras\u0131ndaki \u00f6l\u00e7\u00fcm fark\u0131n\u0131 g\u00f6sterir.<\/span><\/p>\n
 Siyah \u00e7izgi, iki cihaz aras\u0131ndaki \u00f6l\u00e7\u00fcmlerdeki ortalama fark\u0131 temsil ederken, iki k\u0131rm\u0131z\u0131 noktal\u0131 \u00e7izgi, ortalama fark i\u00e7in %95 g\u00fcven aral\u0131\u011f\u0131n\u0131n s\u0131n\u0131rlar\u0131n\u0131 temsil eder.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"
Bland-Altman grafi\u011fi, iki farkl\u0131 alet veya iki farkl\u0131 \u00f6l\u00e7\u00fcm tekni\u011fi aras\u0131ndaki \u00f6l\u00e7\u00fcm farklar\u0131n\u0131 g\u00f6rselle\u015ftirmek i\u00e7in kullan\u0131l\u0131r. Ayn\u0131 kavram\u0131 \u00f6l\u00e7mede iki ara\u00e7 veya tekni\u011fin ne kadar benzer oldu\u011funu belirlemek a\u00e7\u0131s\u0131ndan faydal\u0131d\u0131r. Bu e\u011fitimde, R’de bir Bland-Altman grafi\u011finin nas\u0131l olu\u015fturulaca\u011f\u0131na ili\u015fkin ad\u0131m ad\u0131m bir \u00f6rnek sunulmaktad\u0131r. 1. Ad\u0131m: Verileri olu\u015fturun Bir biyolo\u011fun, 20 farkl\u0131 kurba\u011fadan olu\u015fan ayn\u0131 […]<\/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-1542","post","type-post","status-publish","format-standard","hentry","category-rehber"],"yoast_head":"\nR'de Bland-Altman Grafi\u011fi Nas\u0131l Olu\u015fturulur (Ad\u0131m Ad\u0131m)<\/title>\n<meta name=\"description\" content=\"Bu e\u011fitimde, ad\u0131m ad\u0131m bir \u00f6rnek de dahil olmak \u00fczere R'de bir Bland-Altman grafi\u011finin nas\u0131l olu\u015fturulaca\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\/altman-grafigini-soldur\/\" \/>\n<meta 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