{"id":669,"date":"2023-07-29T03:56:06","date_gmt":"2023-07-29T03:56:06","guid":{"rendered":"https:\/\/statorials.org\/id\/plot-t-distribusi-r\/"},"modified":"2023-07-29T03:56:06","modified_gmt":"2023-07-29T03:56:06","slug":"plot-t-distribusi-r","status":"publish","type":"post","link":"https:\/\/statorials.org\/id\/plot-t-distribusi-r\/","title":{"rendered":"Cara memplot distribusi t di r"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Untuk memplot fungsi kepadatan probabilitas untuk distribusi at di R, kita dapat menggunakan fungsi berikut:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>dt(x, df)<\/strong> untuk membuat fungsi kepadatan probabilitas<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>curve(function, from = NULL, to = NULL)<\/strong> untuk memplot fungsi kepadatan probabilitas<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">Untuk memplot fungsi kepadatan probabilitas, kita perlu menentukan <strong>df<\/strong> (derajat kebebasan) dalam fungsi <strong>dt()<\/strong> serta nilai <strong>dari<\/strong> dan <strong>ke<\/strong> dalam fungsi <strong>curve()<\/strong> .<\/span><\/p>\n<p> <span style=\"color: #000000;\">Misalnya, kode berikut mengilustrasikan cara memplot fungsi kepadatan probabilitas untuk distribusi dengan 10 derajat kebebasan dengan sumbu x plot antara -4 dan 4:<\/span> <\/p>\n<pre style=\"background-color: #e5e5e5; font-size: 15px;\"> <strong>curve(dt(x, df=10), from=-4, to=4)\n<\/strong><\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-6424 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/tdistr1.png\" alt=\"Merencanakan distribusi t di R\" width=\"421\" height=\"388\" srcset=\"\" sizes=\"\"><\/p>\n<p> <span style=\"color: #000000;\">Mirip dengan distribusi normal , distribusi t simetris di sekitar mean 0.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Kita dapat menambahkan judul, mengubah label sumbu Y, menambah lebar baris, dan bahkan mengubah warna baris untuk membuat plot lebih estetis:<\/span> <\/p>\n<pre style=\"background-color: #e5e5e5; font-size: 15px;\"> <strong>curve(dt(x, df=10), from=-4, to=4, \n    main = 't Distribution (df = 10)', <span style=\"color: #008080;\">#add title<\/span>\n    ylab = 'Density', <span style=\"color: #008080;\">#change y-axis label<\/span>\n    lwd = 2, <span style=\"color: #008080;\">#increase line width to 2<\/span>\n    col = 'steelblue') <span style=\"color: #008080;\">#change line color to steelblue<\/span> \n<\/strong><\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-6430 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/tdistr4.png\" alt=\"t Diagram distribusi di R\" width=\"421\" height=\"405\" srcset=\"\" sizes=\"\"><\/p>\n<p> <span style=\"color: #000000;\">Kita juga dapat menambahkan beberapa kurva pada grafik untuk membandingkan t distribusi dengan derajat kebebasan yang berbeda. Misalnya, kode berikut membuat t plot distribusi dengan df = 6, df = 10, dan df = 30:<\/span> <\/p>\n<pre style=\"background-color: #e5e5e5; font-size: 15px;\"> <strong>curve(dt(x, df=6), from=-4, to=4, col='blue') \ncurve(dt(x, df=10), from=-4, to=4, col='red', add=TRUE)\ncurve(dt(x, df=30), from=-4, to=4, col='green', add=TRUE)\n<\/strong><\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-6425 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/tdistr2.png\" alt=\"Beberapa plot distribusi t di R\" width=\"421\" height=\"408\" srcset=\"\" sizes=\"\"><\/p>\n<p> <span style=\"color: #000000;\">Kita dapat menambahkan legenda ke plot menggunakan fungsi <strong>legenda()<\/strong> , yang menggunakan sintaks berikut:<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>legenda(x, y=NULL, legenda, isi, kolom, bg, lty, cex)<\/strong><\/span><\/p>\n<p> <span style=\"color: #000000;\">Emas:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>x, y:<\/strong> koordinat x dan y yang digunakan untuk memposisikan legenda<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>legenda:<\/strong> teks yang akan dimasukkan ke dalam legenda<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>fill:<\/strong> mengisi warna di dalam legenda<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>col:<\/strong> daftar warna yang digunakan untuk garis di dalam legenda<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>bg :<\/strong> warna latar legenda<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>lty:<\/strong> gaya garis<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>cex:<\/strong> ukuran teks dalam legenda<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">Dalam contoh kita, kita akan menggunakan sintaks berikut untuk membuat legenda:<\/span> <\/p>\n<pre style=\"background-color: #e5e5e5; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#create density plots<\/span>\ncurve(dt(x, df=6), from=-4, to=4, col='blue') \ncurve(dt(x, df=10), from=-4, to=4, col='red', add=TRUE)\ncurve(dt(x, df=30), from=-4, to=4, col='green', add=TRUE)\n\n<span style=\"color: #008080;\">#add legend<\/span>\nlegend(-4, .3, legend=c(\"df=6\", \"df=10\", \"df=30\"),\n       col=c(\"blue\", \"red\", \"green\"), lty=1, cex=1.2)<\/strong> <\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-6427 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/tdistr3.png\" alt=\"Beberapa plot distribusi-t dengan legenda di R\" width=\"416\" height=\"398\" srcset=\"\" sizes=\"\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Untuk memplot fungsi kepadatan probabilitas untuk distribusi at di R, kita dapat menggunakan fungsi berikut: dt(x, df) untuk membuat fungsi kepadatan probabilitas curve(function, from = NULL, to = NULL) untuk memplot fungsi kepadatan probabilitas Untuk memplot fungsi kepadatan probabilitas, kita perlu menentukan df (derajat kebebasan) dalam fungsi dt() serta nilai dari dan ke dalam fungsi [&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 - 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