{"id":1144,"date":"2023-07-27T12:43:28","date_gmt":"2023-07-27T12:43:28","guid":{"rendered":"https:\/\/statorials.org\/id\/r-ke-kuadrat-r\/"},"modified":"2023-07-27T12:43:28","modified_gmt":"2023-07-27T12:43:28","slug":"r-ke-kuadrat-r","status":"publish","type":"post","link":"https:\/\/statorials.org\/id\/r-ke-kuadrat-r\/","title":{"rendered":"Cara mencari koefisien determinasi (r-kuadrat) pada r"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\"><strong>Koefisien determinasi<\/strong> (biasa dilambangkan R <sup>2<\/sup> ) adalah proporsi varians <a href=\"https:\/\/statorials.org\/id\/variabel-tanggapan-penjelas\/\" target=\"_blank\" rel=\"noopener noreferrer\">variabel respon<\/a> yang dapat dijelaskan oleh variabel penjelas dalam model regresi.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Tutorial ini memberikan contoh cara menemukan dan menginterpretasikan <sup>R2<\/sup> dalam model regresi di R.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>Terkait:<\/strong> <a href=\"https:\/\/statorials.org\/id\/nilai-r-kuadrat-yang-bagus\/\" target=\"_blank\" rel=\"noopener noreferrer\">Berapa nilai R-kuadrat yang bagus?<\/a><\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Contoh: menemukan dan menafsirkan R-square di R<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Misalkan kita memiliki kumpulan data berikut yang berisi data jumlah jam belajar, ujian persiapan yang diambil, dan nilai ujian yang diterima untuk 15 siswa:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#create data frame<\/span>\ndf &lt;- data.frame(hours=c(1, 2, 2, 4, 2, 1, 5, 4, 2, 4, 4, 3, 6, 5, 3),\n                 prep_exams=c(1, 3, 3, 5, 2, 2, 1, 1, 0, 3, 4, 3, 2, 4, 4),\n                 score=c(76, 78, 85, 88, 72, 69, 94, 94, 88, 92, 90, 75, 96, 90, 82))\n\n<span style=\"color: #008080;\">#view first six rows of data frame<\/span>\nhead(df)\n\n  hours prep_exams score\n1 1 1 76\n2 2 3 78\n3 2 3 85\n4 4 5 88\n5 2 2 72\n6 1 2 69\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Kode berikut menunjukkan cara menyesuaikan <a href=\"https:\/\/statorials.org\/id\/regresi-linier-berganda-r\/\" target=\"_blank\" rel=\"noopener noreferrer\">model regresi linier berganda<\/a> ke kumpulan data ini dan menampilkan keluaran model di R:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#fit regression model<\/span>\nmodel &lt;- lm(score~hours+prep_exams, data=df)\n\n<span style=\"color: #008080;\">#view model summary<\/span>\nsummary(model)\n\nCall:\nlm(formula = score ~ hours + prep_exams, data = df)\n\nResiduals:\n    Min 1Q Median 3Q Max \n-7.9896 -2.5514 0.3079 3.3370 7.0352 \n\nCoefficients:\n            Estimate Std. Error t value Pr(&gt;|t|)    \n(Intercept) 71.8078 3.5222 20.387 1.12e-10 ***\nhours 5.0247 0.8964 5.606 0.000115 ***\nprep_exams -1.2975 0.9689 -1.339 0.205339    \n---\nSignificant. codes: 0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1\n\nResidual standard error: 4.944 on 12 degrees of freedom\nMultiple R-squared: 0.7237, Adjusted R-squared: 0.6776 \nF-statistic: 15.71 on 2 and 12 DF, p-value: 0.0004454<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">R-kuadrat model (ditunjukkan di bagian paling bawah keluaran) ternyata <strong>0,7237<\/strong> .<\/span><\/p>\n<p> <span style=\"color: #000000;\">Artinya <strong>72,37%<\/strong> variasi nilai ujian dapat dijelaskan oleh jumlah jam belajar dan jumlah ujian praktik yang diambil.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Perhatikan bahwa Anda juga dapat mengakses nilai ini menggunakan sintaks berikut:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>summary(model)$r.squared\n\n[1] 0.7236545<\/strong><\/pre>\n<h3> <span style=\"color: #000000;\"><strong>Bagaimana menafsirkan nilai R-kuadrat<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Nilai R kuadrat akan selalu antara 0 dan 1.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Nilai 1 menunjukkan bahwa variabel penjelas mampu menjelaskan secara sempurna varians variabel respon dan nilai 0 menunjukkan bahwa variabel penjelas tidak mempunyai kemampuan dalam menjelaskan varians variabel respon.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Secara umum, semakin besar nilai R-squared suatu model regresi, maka variabel penjelas tersebut semakin mampu memprediksi nilai variabel respon.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Lihat <a href=\"https:\/\/statorials.org\/id\/nilai-r-kuadrat-yang-bagus\/\" target=\"_blank\" rel=\"noopener noreferrer\">artikel ini<\/a> untuk mengetahui detail selengkapnya tentang cara menentukan apakah nilai R-kuadrat tertentu dianggap &#8220;baik&#8221; untuk model regresi tertentu.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>Terkait:<\/strong><\/span> <a href=\"https:\/\/statorials.org\/id\/r-kotak-di-r-cocok\/\" target=\"_blank\" rel=\"noopener noreferrer\">Cara menghitung R-kuadrat yang disesuaikan di R<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Koefisien determinasi (biasa dilambangkan R 2 ) adalah proporsi varians variabel respon yang dapat dijelaskan oleh variabel penjelas dalam model regresi. Tutorial ini memberikan contoh cara menemukan dan menginterpretasikan R2 dalam model regresi di R. Terkait: Berapa nilai R-kuadrat yang bagus? Contoh: menemukan dan menafsirkan R-square di R Misalkan kita memiliki kumpulan data berikut yang [&hellip;]<\/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":"<!-- This site is optimized with the Yoast SEO plugin v21.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Cara mencari koefisien determinasi (R-kuadrat) pada R<\/title>\n<meta name=\"description\" content=\"Tutorial ini menjelaskan cara menghitung koefisien determinasi (R-kuadrat) pada R, dengan beberapa contoh.\" \/>\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\/r-ke-kuadrat-r\/\" \/>\n<meta property=\"og:locale\" content=\"id_ID\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Cara mencari koefisien determinasi (R-kuadrat) pada R\" \/>\n<meta property=\"og:description\" content=\"Tutorial ini menjelaskan cara menghitung koefisien determinasi (R-kuadrat) pada R, dengan beberapa contoh.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/id\/r-ke-kuadrat-r\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-27T12:43:28+00:00\" \/>\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\/r-ke-kuadrat-r\/\",\"url\":\"https:\/\/statorials.org\/id\/r-ke-kuadrat-r\/\",\"name\":\"Cara mencari koefisien determinasi (R-kuadrat) pada R\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/id\/#website\"},\"datePublished\":\"2023-07-27T12:43:28+00:00\",\"dateModified\":\"2023-07-27T12:43:28+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/id\/#\/schema\/person\/3d17a1160dd2d052b7c78e502cb9ec81\"},\"description\":\"Tutorial ini menjelaskan cara menghitung koefisien determinasi (R-kuadrat) pada R, dengan beberapa contoh.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/id\/r-ke-kuadrat-r\/#breadcrumb\"},\"inLanguage\":\"id\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/id\/r-ke-kuadrat-r\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/id\/r-ke-kuadrat-r\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/statorials.org\/id\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Cara mencari koefisien determinasi (r-kuadrat) pada 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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