{"id":2800,"date":"2023-07-20T15:33:12","date_gmt":"2023-07-20T15:33:12","guid":{"rendered":"https:\/\/statorials.org\/pl\/zbior-danych-mtcars-r\/"},"modified":"2023-07-20T15:33:12","modified_gmt":"2023-07-20T15:33:12","slug":"zbior-danych-mtcars-r","status":"publish","type":"post","link":"https:\/\/statorials.org\/pl\/zbior-danych-mtcars-r\/","title":{"rendered":"Kompletny przewodnik po zbiorze danych mtcars w r"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Zbi\u00f3r danych <strong>mtcars<\/strong> to zintegrowany zbi\u00f3r danych w j\u0119zyku R, kt\u00f3ry zawiera pomiary 11 r\u00f3\u017cnych atrybut\u00f3w dla 32 r\u00f3\u017cnych samochod\u00f3w.<\/span><\/p>\n<p> <span style=\"color: #000000;\">W tym samouczku wyja\u015bniono, jak eksplorowa\u0107, podsumowywa\u0107 i wizualizowa\u0107 zbi\u00f3r danych <strong>mtcars<\/strong> w j\u0119zyku R.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>Powi\u0105zane:<\/strong> <a href=\"https:\/\/statorials.org\/pl\/zbior-danych-iris-r\/\" target=\"_blank\" rel=\"noopener\">Kompletny przewodnik po zestawie danych Iris w j\u0119zyku R<\/a><\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Za\u0142aduj zbi\u00f3r danych mtcars<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Poniewa\u017c zbi\u00f3r danych <strong>mtcars<\/strong> jest zbiorem danych wbudowanym w R, mo\u017cemy go za\u0142adowa\u0107 za pomoc\u0105 nast\u0119puj\u0105cego polecenia:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong>data(mtcars)<\/strong><\/span><\/pre>\n<p> <span style=\"color: #000000;\">Mo\u017cemy przyjrze\u0107 si\u0119 pierwszym sze\u015bciu wierszom zbioru danych za pomoc\u0105 funkcji <strong>head()<\/strong> :<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong><span style=\"color: #008080;\">#view first six rows of mtcars dataset<\/span>\nhead(mtcars)\n\n                   mpg cyl disp hp drat wt qsec vs am gear carb\nMazda RX4 21.0 6 160 110 3.90 2.620 16.46 0 1 4 4\nMazda RX4 Wag 21.0 6 160 110 3.90 2.875 17.02 0 1 4 4\nDatsun 710 22.8 4 108 93 3.85 2.320 18.61 1 1 4 1\nHornet 4 Drive 21.4 6 258 110 3.08 3.215 19.44 1 0 3 1\nHornet Sportabout 18.7 8 360 175 3.15 3.440 17.02 0 0 3 2\nValiant 18.1 6 225 105 2.76 3,460 20.22 1 0 3 1\n<\/strong><\/span><\/pre>\n<h3> <span style=\"color: #000000;\"><strong>Podsumuj zbi\u00f3r danych mtcars<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Mo\u017cemy u\u017cy\u0107 funkcji <strong>podsumowania()<\/strong> , aby szybko podsumowa\u0107 ka\u017cd\u0105 zmienn\u0105 w zbiorze danych:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong><span style=\"color: #008080;\">#summarize mtcars dataset<\/span>\nsummary(mtcars)\n\n      mpg cyl disp hp       \n Min. :10.40 Min. :4,000 Min. : 71.1 Min. : 52.0  \n 1st Q:15.43 1st Q:4,000 1st Q:120.8 1st Q:96.5  \n Median: 19.20 Median: 6.000 Median: 196.3 Median: 123.0  \n Mean:20.09 Mean:6.188 Mean:230.7 Mean:146.7  \n 3rd Q:22.80 3rd Q:8,000 3rd Q:326.0 3rd Q:180.0  \n Max. :33.90 Max. :8,000 Max. :472.0 Max. :335.0  \n      drat wt qsec vs        \n Min. :2.760 Min. :1.513 Min. :14.50 Min. :0.0000  \n 1st Qu.:3.080 1st Qu.:2.581 1st Qu.:16.89 1st Qu.:0.0000  \n Median: 3.695 Median: 3.325 Median: 17.71 Median: 0.0000  \n Mean:3.597 Mean:3.217 Mean:17.85 Mean:0.4375  \n 3rd Qu.:3.920 3rd Qu.:3.610 3rd Qu.:18.90 3rd Qu.:1.0000  \n Max. :4.930 Max. :5.424 Max. :22.90 Max. :1.0000  \n       am gear carb      \n Min. :0.0000 Min. :3,000 Min. :1,000  \n 1st Qu.:0.0000 1st Qu.:3.000 1st Qu.:2.000  \n Median: 0.0000 Median: 4.000 Median: 2.000  \n Mean:0.4062 Mean:3.688 Mean:2.812  \n 3rd Qu.:1.0000 3rd Qu.:4.000 3rd Qu.:4.000  \n Max. :1.0000 Max. :5,000 Max. :8,000<\/strong><\/span><\/pre>\n<p> <span style=\"color: #000000;\">Dla ka\u017cdej z 11 zmiennych mo\u017cemy zobaczy\u0107 nast\u0119puj\u0105ce informacje:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>Min<\/strong> .: Warto\u015b\u0107 minimalna.<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>1. Qu<\/strong> : Warto\u015b\u0107 pierwszego kwartyla (25. percentyl).<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>Mediana<\/strong> : Warto\u015b\u0107 mediana.<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>\u015arednia<\/strong> : Warto\u015b\u0107 \u015brednia.<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>3rd Qu<\/strong> : Warto\u015b\u0107 trzeciego kwartyla (75. percentyl).<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>Maks<\/strong> .: Warto\u015b\u0107 maksymalna.<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">Mo\u017cemy u\u017cy\u0107 funkcji <strong>dim()<\/strong> , aby uzyska\u0107 wymiary zbioru danych pod wzgl\u0119dem liczby wierszy i kolumn:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong><span style=\"color: #008080;\">#display rows and columns<\/span>\ndim(mtcars)\n\n[1] 32 11\n<\/strong><\/span><\/pre>\n<p> <span style=\"color: #000000;\">Widzimy, \u017ce zbi\u00f3r danych ma <b>32<\/b> wiersze i <strong>11<\/strong> kolumn.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Mo\u017cemy r\u00f3wnie\u017c u\u017cy\u0107 funkcji <strong>Names()<\/strong> do wy\u015bwietlenia nazw kolumn ramki danych:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong><span style=\"color: #008080;\">#display column names<\/span>\nnames(mtcars)\n\n [1] \"mpg\" \"cyl\" \"disp\" \"hp\" \"drat\" \"wt\" \"qsec\" \"vs\" \"am\" \"gear\"\n[11] \u201ccarb\u201d     \n<\/strong><\/span><\/pre>\n<h3> <span style=\"color: #000000;\"><strong>Wizualizuj zbi\u00f3r danych mtcars<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Mo\u017cemy tak\u017ce tworzy\u0107 wykresy w celu wizualizacji warto\u015bci zbioru danych.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Mo\u017cemy na przyk\u0142ad u\u017cy\u0107 funkcji <strong>hist()<\/strong> do stworzenia histogramu warto\u015bci okre\u015blonej zmiennej:<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong><span style=\"color: #008080;\">#create histogram of values for mpg<\/span>\nhist(mtcars$mpg,\n     col=' <span style=\"color: #ff0000;\">steelblue<\/span> ',\n     main=' <span style=\"color: #ff0000;\">Histogram<\/span> ',\n     xlab=' <span style=\"color: #ff0000;\">mpg<\/span> ',\n     ylab=' <span style=\"color: #ff0000;\">Frequency<\/span> ')\n<\/strong><\/span><\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-24608 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/mtcars1-1.jpg\" alt=\"\" width=\"474\" height=\"346\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">Mo\u017cemy tak\u017ce u\u017cy\u0107 funkcji <strong>boxplot()<\/strong> do stworzenia <a href=\"https:\/\/statorials.org\/pl\/wasy-pude\u0142kowe\/\" target=\"_blank\" rel=\"noopener\">wykresu pude\u0142kowego<\/a> , kt\u00f3ry zwizualizuje rozk\u0142ad warto\u015bci dla okre\u015blonej zmiennej:<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong><span style=\"color: #008080;\">#create boxplot of values for mpg<\/span><span style=\"color: #000000;\">\nboxplot(mtcars$mpg,\n        main='<\/span> <span style=\"color: #ff0000;\">Distribution of mpg values<\/span> <span style=\"color: #000000;\">',<\/span><span style=\"color: #000000;\">\n        ylab='<\/span> <span style=\"color: #ff0000;\">mpg<\/span> <span style=\"color: #000000;\">',\n        col='<\/span> <span style=\"color: #ff0000;\">steelblue<\/span> <span style=\"color: #000000;\">',\n        border='<\/span> <span style=\"color: #ff0000;\">black<\/span> <span style=\"color: #000000;\">')<\/span><\/strong><\/span> <\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-24610 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/mtcars3.jpg\" alt=\"\" width=\"434\" height=\"435\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">Mo\u017cemy r\u00f3wnie\u017c u\u017cy\u0107 funkcji <strong>plot()<\/strong> do utworzenia wykresu rozrzutu dowolnej kombinacji zmiennych parami:<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong><span style=\"color: #008080;\">#create scatterplot of mpg vs. wt<\/span>\nplot(mtcars$mpg, mtcars$wt,\n     col=' <span style=\"color: #ff0000;\">steelblue<\/span> ',\n     main=' <span style=\"color: #ff0000;\">Scatterplot<\/span> ',\n     xlab=' <span style=\"color: #ff0000;\">mpg<\/span> ',\n     ylab=' <span style=\"color: #ff0000;\">wt<\/span> ',\n     pch= <span style=\"color: #008000;\">19<\/span> )<\/strong><\/span> <\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-24609 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/mtcars2.jpg\" alt=\"\" width=\"508\" height=\"362\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">Korzystaj\u0105c z tych wbudowanych funkcji w R, mo\u017cemy dowiedzie\u0107 si\u0119 wiele o zbiorze danych <strong>mtcars<\/strong> .<\/span><\/p>\n<p> <span style=\"color: #000000;\">Je\u015bli chcesz przeprowadzi\u0107 bardziej zaawansowan\u0105 analiz\u0119 statystyczn\u0105 na podstawie tego zbioru danych, zapoznaj si\u0119 z <a href=\"https:\/\/statorials.org\/pl\/glm-vs-lm-w-r\/\" target=\"_blank\" rel=\"noopener\">tym samouczkiem<\/a> , kt\u00f3ry wyja\u015bnia, jak dopasowa\u0107 modele regresji liniowej i uog\u00f3lnione modele liniowe przy u\u017cyciu zbioru danych <strong>mtcars<\/strong> .<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Dodatkowe zasoby<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Poni\u017csze samouczki wyja\u015bniaj\u0105, jak wykonywa\u0107 inne typowe zadania w j\u0119zyku R:<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/pl\/tabela-podsumowujaca-w-r\/\" target=\"_blank\" rel=\"noopener\">Naj\u0142atwiejszy spos\u00f3b tworzenia tabel podsumowa\u0144 w R<\/a><br \/> <a href=\"https:\/\/statorials.org\/pl\/piec-liczb-podsumowanych-w-r\/\" target=\"_blank\" rel=\"noopener\">Jak obliczy\u0107 podsumowanie pi\u0119ciu liczb w R<\/a><br \/> <a href=\"https:\/\/statorials.org\/pl\/prosta-regresja-liniowa-w-r\/\" target=\"_blank\" rel=\"noopener\">Jak wykona\u0107 prost\u0105 regresj\u0119 liniow\u0105 w R<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Zbi\u00f3r danych mtcars to zintegrowany zbi\u00f3r danych w j\u0119zyku R, kt\u00f3ry zawiera pomiary 11 r\u00f3\u017cnych atrybut\u00f3w dla 32 r\u00f3\u017cnych samochod\u00f3w. W tym samouczku wyja\u015bniono, jak eksplorowa\u0107, podsumowywa\u0107 i wizualizowa\u0107 zbi\u00f3r danych mtcars w j\u0119zyku R. Powi\u0105zane: Kompletny przewodnik po zestawie danych Iris w j\u0119zyku R Za\u0142aduj zbi\u00f3r danych mtcars Poniewa\u017c zbi\u00f3r danych mtcars jest zbiorem [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-2800","post","type-post","status-publish","format-standard","hentry","category-przewodnik"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Kompletny przewodnik po zestawie danych mtcars w R - Statology<\/title>\n<meta name=\"description\" content=\"W tym samouczku wyja\u015bniono, jak \u0142adowa\u0107 i analizowa\u0107 zbi\u00f3r danych mtcars w j\u0119zyku R, \u0142\u0105cznie z pe\u0142nym przyk\u0142adem.\" \/>\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\/pl\/zbior-danych-mtcars-r\/\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Kompletny przewodnik po zestawie danych mtcars w R - Statology\" \/>\n<meta property=\"og:description\" content=\"W tym samouczku wyja\u015bniono, jak \u0142adowa\u0107 i analizowa\u0107 zbi\u00f3r danych mtcars w j\u0119zyku R, \u0142\u0105cznie z pe\u0142nym przyk\u0142adem.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pl\/zbior-danych-mtcars-r\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-20T15:33:12+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/mtcars1-1.jpg\" \/>\n<meta name=\"author\" content=\"Benjamin Anderson\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Napisane przez\" \/>\n\t<meta name=\"twitter:data1\" content=\"Benjamin Anderson\" \/>\n\t<meta name=\"twitter:label2\" content=\"Szacowany czas czytania\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minuty\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/statorials.org\/pl\/zbior-danych-mtcars-r\/\",\"url\":\"https:\/\/statorials.org\/pl\/zbior-danych-mtcars-r\/\",\"name\":\"Kompletny przewodnik po zestawie danych mtcars w R - Statology\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pl\/#website\"},\"datePublished\":\"2023-07-20T15:33:12+00:00\",\"dateModified\":\"2023-07-20T15:33:12+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/6484727a4612df3e69f016c3129c6965\"},\"description\":\"W tym samouczku wyja\u015bniono, jak \u0142adowa\u0107 i analizowa\u0107 zbi\u00f3r danych mtcars w j\u0119zyku R, \u0142\u0105cznie z pe\u0142nym przyk\u0142adem.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pl\/zbior-danych-mtcars-r\/#breadcrumb\"},\"inLanguage\":\"pl-PL\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pl\/zbior-danych-mtcars-r\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pl\/zbior-danych-mtcars-r\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Dom\",\"item\":\"https:\/\/statorials.org\/pl\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Kompletny przewodnik po zbiorze danych mtcars w r\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/statorials.org\/pl\/#website\",\"url\":\"https:\/\/statorials.org\/pl\/\",\"name\":\"Statorials\",\"description\":\"Tw\u00f3j przewodnik po kompetencjach statystycznych!\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/statorials.org\/pl\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"pl-PL\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/6484727a4612df3e69f016c3129c6965\",\"name\":\"Benjamin Anderson\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"pl-PL\",\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/statorials.org\/pl\/wp-content\/uploads\/2023\/11\/Benjamin-Anderson-96x96.jpg\",\"contentUrl\":\"https:\/\/statorials.org\/pl\/wp-content\/uploads\/2023\/11\/Benjamin-Anderson-96x96.jpg\",\"caption\":\"Benjamin Anderson\"},\"description\":\"Cze\u015b\u0107, jestem Benjamin i jestem emerytowanym profesorem statystyki, kt\u00f3ry zosta\u0142 oddanym nauczycielem Statorials. 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