{"id":2711,"date":"2023-07-21T01:48:22","date_gmt":"2023-07-21T01:48:22","guid":{"rendered":"https:\/\/statorials.org\/id\/persilangan-produk-di-sungai\/"},"modified":"2023-07-21T01:48:22","modified_gmt":"2023-07-21T01:48:22","slug":"persilangan-produk-di-sungai","status":"publish","type":"post","link":"https:\/\/statorials.org\/id\/persilangan-produk-di-sungai\/","title":{"rendered":"Cara menghitung perkalian silang di r"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Dengan asumsi kita memiliki vektor A dengan elemen (A <sub>1<\/sub> , A <sub>2<\/sub> , A <sub>3<\/sub> ) dan vektor B dengan elemen (B <sub>1<\/sub> , B <sub>2<\/sub> , B <sub>3<\/sub> ), kita dapat menghitung perkalian silang kedua vektor tersebut sebagai berikut:<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>Perkalian silang<\/strong> = [(A <sub>2<\/sub> *B <sub>3<\/sub> ) \u2013 (A <sub>3<\/sub> *B <sub>2<\/sub> ), (A <sub>3<\/sub> *B <sub>1<\/sub> ) \u2013 (A <sub>1<\/sub> *B <sub>3<\/sub> ), (A <sub>1<\/sub> *B <sub>2<\/sub> ) \u2013 (A <sub>2<\/sub> *B <sub>1<\/sub> )]<\/span><\/p>\n<p> <span style=\"color: #000000;\">Misalnya kita mempunyai vektor-vektor berikut:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">Vektor A : (1, 2, 3)<\/span><\/li>\n<li> <span style=\"color: #000000;\">Vektor B: (4, 5, 6)<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">Kita dapat menghitung perkalian silang vektor-vektor tersebut sebagai berikut:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">Perkalian silang = [(A <sub>2<\/sub> *B <sub>3<\/sub> ) \u2013 (A <sub>3<\/sub> *B <sub>2<\/sub> ), (A <sub>3<\/sub> *B <sub>1<\/sub> ) \u2013 (A <sub>1<\/sub> *B <sub>3<\/sub> ), (A <sub>1<\/sub> *B <sub>2<\/sub> ) \u2013 (A <sub>2<\/sub> *B <sub>1<\/sub> )]<\/span><\/li>\n<li> <span style=\"color: #000000;\">Perkalian silang = [(2*6) \u2013 (3*5), (3*4) \u2013 (1*6), (1*5) \u2013 (2*4)]<\/span><\/li>\n<li> <span style=\"color: #000000;\">Hasil kali silang = (-3, 6, -3)<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">Anda dapat menggunakan salah satu dari dua metode untuk menghitung perkalian silang dua vektor di R:<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>Metode 1: gunakan fungsi cross() dari paket pracma<\/strong><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #107d3f;\">library<\/span> (pracma)\n  \n<span style=\"color: #008080;\">#calculate cross product of vectors A and B\n<\/span>cross(A, B)\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><strong>Metode 2: Tentukan fungsi Anda sendiri<\/strong><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#define function to calculate cross product<\/span> \ncross &lt;- <span style=\"color: #008000;\">function<\/span> (x, y, i=1:3) {\n  create3D &lt;- <span style=\"color: #008000;\">function<\/span> (x) <span style=\"color: #3366ff;\">head<\/span> (c(x, <span style=\"color: #3366ff;\">rep<\/span> (0, 3)), 3)\n  x &lt;- create3D(x)\n  y &lt;- create3D(y)\n  j &lt;- <span style=\"color: #008000;\">function<\/span> (i) (i-1) <span style=\"color: #800080;\">%%<\/span> 3+1\n  <span style=\"color: #008000;\">return<\/span> (x[j(i+1)]*y[j(i+2)] - x[j(i+2)]*y[j(i+1)])\n}\n\n<span style=\"color: #008080;\">#calculate cross product\n<\/span>cross(A, B)<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Contoh berikut menunjukkan cara menggunakan masing-masing metode dalam praktik.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Contoh 1: Gunakan fungsi cross() dari paket pracma<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Kode berikut menunjukkan cara menggunakan fungsi <strong>cross()<\/strong> dari paket <a href=\"https:\/\/cran.r-project.org\/web\/packages\/pracma\/index.html\" target=\"_blank\" rel=\"noopener\">pracma<\/a> untuk menghitung perkalian silang antara dua vektor:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\">library<\/span> (pracma)\n  \n<span style=\"color: #008080;\">#definevectors\n<\/span>A &lt;- c(1, 2, 3)\nB &lt;- c(4, 5, 6)\n  \n<span style=\"color: #008080;\">#calculate cross product\n<\/span>cross(A, B)\n\n[1] -3 6 -3\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Hasil perkalian silangnya adalah <strong>(-3, 6, -3)<\/strong> .<\/span><\/p>\n<p> <span style=\"color: #000000;\">Ini sesuai dengan perkalian silang yang kami hitung secara manual sebelumnya.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Contoh 2: Tentukan fungsi Anda sendiri<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Kode berikut menunjukkan cara mendefinisikan fungsi Anda sendiri untuk menghitung perkalian silang antara dua vektor:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#define function to calculate cross product<\/span> \ncross &lt;- <span style=\"color: #008000;\">function<\/span> (x, y, i=1:3) {\n  create3D &lt;- <span style=\"color: #008000;\">function<\/span> (x) <span style=\"color: #3366ff;\">head<\/span> (c(x, <span style=\"color: #3366ff;\">rep<\/span> (0, 3)), 3)\n  x &lt;- create3D(x)\n  y &lt;- create3D(y)\n  j &lt;- <span style=\"color: #008000;\">function<\/span> (i) (i-1) <span style=\"color: #800080;\">%%<\/span> 3+1\n  <span style=\"color: #008000;\">return<\/span> (x[j(i+1)]*y[j(i+2)] - x[j(i+2)]*y[j(i+1)])\n}\n\n<span style=\"color: #008080;\">#definevectors\n<\/span>A &lt;- c(1, 2, 3)\nB &lt;- c(4, 5, 6)\n\n<span style=\"color: #008080;\">#calculate cross product\n<\/span>cross(A, B)\n\n[1] -3 6 -3\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Hasil perkalian silangnya adalah <strong>(-3, 6, -3)<\/strong> .<\/span><\/p>\n<p> <span style=\"color: #000000;\">Ini sesuai dengan perkalian silang yang kita hitung pada contoh sebelumnya.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Sumber daya tambahan<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Tutorial berikut menjelaskan cara melakukan tugas umum lainnya di R:<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/id\/produk-titik-di-r\/\" target=\"_blank\" rel=\"noopener\">Cara menghitung perkalian titik di R<\/a><br \/> <a href=\"https:\/\/statorials.org\/id\/matriks-identitas-di-r\/\" target=\"_blank\" rel=\"noopener\">Cara membuat matriks identitas di R<\/a><br \/> <a href=\"https:\/\/statorials.org\/id\/buat-matriks-kosong-di-r\/\" target=\"_blank\" rel=\"noopener\">Cara membuat matriks kosong di R<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Dengan asumsi kita memiliki vektor A dengan elemen (A 1 , A 2 , A 3 ) dan vektor B dengan elemen (B 1 , B 2 , B 3 ), kita dapat menghitung perkalian silang kedua vektor tersebut sebagai berikut: Perkalian silang = [(A 2 *B 3 ) \u2013 (A 3 *B 2 ), [&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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