{"id":940,"date":"2023-07-28T06:10:31","date_gmt":"2023-07-28T06:10:31","guid":{"rendered":"https:\/\/statorials.org\/id\/plot-interval-kepercayaan-r\/"},"modified":"2023-07-28T06:10:31","modified_gmt":"2023-07-28T06:10:31","slug":"plot-interval-kepercayaan-r","status":"publish","type":"post","link":"https:\/\/statorials.org\/id\/plot-interval-kepercayaan-r\/","title":{"rendered":"Cara memplot interval kepercayaan di r"},"content":{"rendered":"

<\/p>\n

\n

Interval kepercayaan adalah rentang nilai yang kemungkinan memuat parameter populasi dengan tingkat kepercayaan tertentu.<\/span><\/p>\n

Tutorial ini menjelaskan cara memplot interval kepercayaan untuk kumpulan data di R.<\/span><\/p>\n

Contoh: memplot interval kepercayaan di R<\/strong><\/h3>\n

Misalkan kita memiliki dataset berikut di R dengan 100 baris dan 2 kolom:<\/span><\/p>\n

 #make this example reproducible<\/span>\nset.seed(0)\n\n#create dataset<\/span>\nx <- rnorm(100)\ny <- x*2 + rnorm(100)\ndf <- data.frame(x = x, y = y)\n\n#view first six rows of dataset<\/span>\nhead(df)\n\n           xy\n1 1.2629543 3.3077678\n2 -0.3262334 -1.4292433\n3 1.3297993 2.0436086\n4 1.2724293 2.5914389\n5 0.4146414 -0.3011029\n6 -1.5399500 -2.5031813\n<\/strong><\/pre>\n
 Untuk membuat grafik hubungan antara x dan y, pertama-tama kita dapat menyesuaikan model regresi linier:<\/span><\/p>\n
 model <- lm(y ~ x, data = df)\n<\/strong><\/pre>\n
 Selanjutnya, kita dapat membuat plot perkiraan garis regresi linier menggunakan fungsi abline() dan fungsi garis() untuk membuat pita kepercayaan sebenarnya:<\/span> <\/p>\n
 #get predicted y values using regression equation<\/span>\nnewx <- seq(min(df$x), max(df$x), length.out=100)\npreds <- predict(model, newdata = data.frame(x=newx), interval = 'confidence')\n\n#create plot of x vs. y, but don't display individual points (type='n')<\/span> \nplot(y ~ x, data = df, type = 'n')\n\n#add fitted regression line<\/span>\nabline(model)\n\n#add dashed lines for confidence bands\n<\/span>lines(newx, preds[,3], lty = 'dashed', col = 'blue')\nlines(newx, preds[,2], lty = 'dashed', col = 'blue')<\/strong> <\/pre>\n
\"Merencanakan<\/p>\n
 Garis hitam menunjukkan garis regresi linier yang pas, sedangkan dua garis biru putus-putus menunjukkan interval kepercayaan.<\/span><\/p>\n
 Secara opsional, Anda juga dapat mengisi area antara garis interval kepercayaan dan perkiraan garis regresi linier menggunakan kode berikut:<\/span> <\/p>\n
 #create plot of x vs. y<\/span>\nplot(y ~ x, data = df, type = 'n')\n\n#fill in area between regression line and confidence interval\npolygon(c(rev(newx), newx), c(rev(preds[,3]), preds[,2]), col = 'grey', border = NA)<\/span>\n\n#add fitted regression line<\/span>\nabline(model)\n\n#add dashed lines for confidence bands\n<\/span>lines(newx, preds[,3], lty = 'dashed', col = 'blue')\nlines(newx, preds[,2], lty = 'dashed', col = 'blue')<\/strong> <\/pre>\n
\"Bagan<\/p>\n
 Berikut kode lengkap dari awal sampai akhir:<\/span><\/p>\n
 #make this example reproducible\nset.seed(0)<\/span>\n\n#create dataset\nx <- rnorm(100)<\/span>\ny <- x*2 + rnorm(100)<\/span>\ndf <- data.frame(x = x, y = y)<\/span>\n\n#fit linear regression model\nmodel <- lm(y ~ x, data = df)<\/span>\n\n#get predicted y values using regression equation\nnewx <- seq(min(df$x), max(df$x), length.out=100)<\/span>\npreds <- predict(model, newdata = data.frame(x=newx), interval = 'confidence')<\/span>\n\n#create plot of x vs. y<\/span>\nplot(y ~ x, data = df, type = 'n')\n\n#fill in area between regression line and confidence interval\npolygon(c(rev(newx), newx), c(rev(preds[,3]), preds[,2]), col = 'grey', border = NA)<\/span>\n\n#add fitted regression line<\/span>\nabline(model)\n\n#add dashed lines for confidence bands\n<\/span>lines(newx, preds[,3], lty = 'dashed', col = 'blue')\nlines(newx, preds[,2], lty = 'dashed', col = 'blue')<\/strong><\/pre>\n
 Sumber daya tambahan<\/strong><\/span><\/h3>\n
 Apa yang dimaksud dengan interval kepercayaan?
 Cara menggunakan fungsi abline() di R untuk menambahkan garis lurus ke plot<\/p>\n","protected":false},"excerpt":{"rendered":"
Interval kepercayaan adalah rentang nilai yang kemungkinan memuat parameter populasi dengan tingkat kepercayaan tertentu. Tutorial ini menjelaskan cara memplot interval kepercayaan untuk kumpulan data di R. Contoh: memplot interval kepercayaan di R Misalkan kita memiliki dataset berikut di R dengan 100 baris dan 2 kolom: #make this example reproducible set.seed(0) #create dataset x <- rnorm(100) […]<\/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":[],"yoast_head":"\nCara memplot interval kepercayaan di R - Statologi<\/title>\n<meta name=\"description\" content=\"Penjelasan sederhana cara memplot interval kepercayaan pada R, beserta contohnya.\" \/>\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\/id\/plot-interval-kepercayaan-r\/\" \/>\n<meta property=\"og:locale\" content=\"id_ID\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Cara memplot interval kepercayaan di R - Statologi\" \/>\n<meta property=\"og:description\" content=\"Penjelasan sederhana cara memplot interval kepercayaan pada R, beserta contohnya.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/id\/plot-interval-kepercayaan-r\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-28T06:10:31+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/plotconfintr1.png\" \/>\n<meta name=\"author\" content=\"Benjamin anderson\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Ditulis oleh\" \/>\n\t<meta name=\"twitter:data1\" content=\"Benjamin anderson\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimasi waktu membaca\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 menit\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/statorials.org\/id\/plot-interval-kepercayaan-r\/\",\"url\":\"https:\/\/statorials.org\/id\/plot-interval-kepercayaan-r\/\",\"name\":\"Cara memplot interval kepercayaan di R - Statologi\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/id\/#website\"},\"datePublished\":\"2023-07-28T06:10:31+00:00\",\"dateModified\":\"2023-07-28T06:10:31+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/id\/#\/schema\/person\/3d17a1160dd2d052b7c78e502cb9ec81\"},\"description\":\"Penjelasan sederhana cara memplot interval kepercayaan pada R, beserta contohnya.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/id\/plot-interval-kepercayaan-r\/#breadcrumb\"},\"inLanguage\":\"id\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/id\/plot-interval-kepercayaan-r\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/id\/plot-interval-kepercayaan-r\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/statorials.org\/id\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Cara memplot interval kepercayaan di r\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/statorials.org\/id\/#website\",\"url\":\"https:\/\/statorials.org\/id\/\",\"name\":\"Statorials\",\"description\":\"Panduan anda untuk kompetensi statistik!\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/statorials.org\/id\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"id\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/statorials.org\/id\/#\/schema\/person\/3d17a1160dd2d052b7c78e502cb9ec81\",\"name\":\"Benjamin anderson\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"id\",\"@id\":\"https:\/\/statorials.org\/id\/#\/schema\/person\/image\/\",\"url\":\"http:\/\/statorials.org\/id\/wp-content\/uploads\/2023\/10\/Dr.-Benjamin-Anderson-96x96.jpg\",\"contentUrl\":\"http:\/\/statorials.org\/id\/wp-content\/uploads\/2023\/10\/Dr.-Benjamin-Anderson-96x96.jpg\",\"caption\":\"Benjamin anderson\"},\"description\":\"Halo, saya Benjamin, pensiunan profesor statistika yang menjadi guru Statorial yang berdedikasi. 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