{"id":3980,"date":"2023-07-14T09:17:12","date_gmt":"2023-07-14T09:17:12","guid":{"rendered":"https:\/\/statorials.org\/pl\/alfa-geom_point-ggplot2\/"},"modified":"2023-07-14T09:17:12","modified_gmt":"2023-07-14T09:17:12","slug":"alfa-geom_point-ggplot2","status":"publish","type":"post","link":"https:\/\/statorials.org\/pl\/alfa-geom_point-ggplot2\/","title":{"rendered":"Jak u\u017cywa\u0107 alfa z geom_point() w ggplot2"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Mo\u017cesz u\u017cy\u0107 argumentu <strong>alfa<\/strong> w funkcji <strong>geom_point()<\/strong> w ggplot2, aby zmieni\u0107 przezroczysto\u015b\u0107 punkt\u00f3w na wykresie.<\/span><\/p>\n<p> <span style=\"color: #000000;\">W tym argumencie zastosowano nast\u0119puj\u0105c\u0105 podstawow\u0105 sk\u0142adni\u0119:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>ggplot(df, aes(x=x, y=y)) +\n  geom_point(alpha= <span style=\"color: #008000;\">1<\/span> )\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><span style=\"color: #000000;\">Warto\u015b\u0107 <strong>alfa<\/strong> mo\u017ce wynosi\u0107 od 0 do 1, gdzie:<\/span><\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>0<\/strong> jest ca\u0142kowicie przezroczysty<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>1<\/strong> jest ca\u0142kowicie solidny<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">Domy\u015blna warto\u015b\u0107 <strong>alfa<\/strong> to <strong>1<\/strong> .<\/span><\/p>\n<p> <span style=\"color: #000000;\">Ustawiaj\u0105c <strong>alfa<\/strong> na warto\u015b\u0107 mniejsz\u0105 ni\u017c 1, \u0142atwiej jest wizualizowa\u0107 nak\u0142adaj\u0105ce si\u0119 punkty na wykresie, co jest szczeg\u00f3lnie przydatne podczas kre\u015blenia punkt\u00f3w z du\u017cego zbioru danych.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Poni\u017csze przyk\u0142ady pokazuj\u0105, jak w praktyce u\u017cywa\u0107 argumentu <strong>alfa<\/strong> z nast\u0119puj\u0105c\u0105 ramk\u0105 danych zawieraj\u0105c\u0105 5000 wierszy:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#make this example reproducible\n<\/span>set. <span style=\"color: #3366ff;\">seeds<\/span> (1)\n\n<span style=\"color: #008080;\">#create data frame with 5000 rows\n<\/span>df &lt;- data. <span style=\"color: #3366ff;\">frame<\/span> (x=runif(n=5000, min=1, max=100))\n\ndf$y = df$x*3 + runif(5000)*df$x^2\n\n<span style=\"color: #008080;\">#view head of data frame\n<\/span>head(df)\n\n         xy\n1 27.28536 108.2851\n2 37.84027 622.8478\n3 57.71248 1002.0662\n4 90.91257 7539.2476\n5 20.96651 202.6813\n6 89.94058 2867.4643\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><strong>Powi\u0105zane:<\/strong> <a href=\"https:\/\/statorials.org\/pl\/runif-w-r\/\" target=\"_blank\" rel=\"noopener\">Jak u\u017cywa\u0107 funkcji runif w R<\/a><\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>Przyk\u0142ad 1: U\u017cycie alfa = 1 w geom_point()<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Poni\u017cszy kod pokazuje, jak utworzy\u0107 wykres rozrzutu w ggplot2 przy u\u017cyciu domy\u015blnej warto\u015bci 1 dla argumentu <strong>alfa<\/strong> :<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #008000;\">library<\/span> (ggplot2)\n<\/span>\n#create scatter plot with default alpha value\n<span style=\"color: #000000;\">ggplot(df, aes(x=x, y=y)) +\n  geom_point()\n<\/span><\/span><\/strong><\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-31885 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/alpha3.jpg\" alt=\"\" width=\"587\" height=\"428\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">Nale\u017cy zauwa\u017cy\u0107, \u017ce punkty wykresu s\u0105 ca\u0142kowicie jednolite, co odpowiada warto\u015bci <strong>alfa<\/strong> r\u00f3wnej 1.<\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>Przyk\u0142ad 2: U\u017cycie alfa = 0 w geom_point()<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Poni\u017cszy kod pokazuje, jak utworzy\u0107 wykres rozrzutu w ggplot2 przy u\u017cyciu warto\u015bci 0 dla argumentu <strong>alfa<\/strong> :<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #008000;\">library<\/span> (ggplot2)\n<\/span>\n#create scatter plot with alpha value of 0\n<span style=\"color: #000000;\">ggplot(df, aes(x=x, y=y)) +\n  geom_point(alpha= <span style=\"color: #008000;\">0<\/span> )\n<\/span><\/span><\/strong><\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-31886 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/alpha4.jpg\" alt=\"\" width=\"586\" height=\"430\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">Wszystkie punkty na \u015bcie\u017cce s\u0105 ca\u0142kowicie przezroczyste, co odpowiada warto\u015bci <strong>alfa<\/strong> r\u00f3wnej 0.<\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>Przyk\u0142ad 3: U\u017cycie alfa = 0,1 w geom_point()<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Poni\u017cszy kod pokazuje, jak utworzy\u0107 wykres rozrzutu w ggplot2 przy u\u017cyciu warto\u015bci 0,1 dla argumentu <strong>alfa<\/strong> :<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #008000;\">library<\/span> (ggplot2)\n<\/span>\n#create scatter plot with alpha value of 0.1\n<span style=\"color: #000000;\">ggplot(df, aes(x=x, y=y)) +\n  geom_point(alpha= <span style=\"color: #008000;\">0.1<\/span> )\n<\/span><\/span><\/strong><\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-31887 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/alpha5.jpg\" alt=\"\" width=\"606\" height=\"445\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\"><span style=\"color: #000000;\">Ustawiaj\u0105c <strong>alfa<\/strong> na 0,1, punkty maj\u0105 poziom przezroczysto\u015bci, kt\u00f3ry pozwala nam zobaczy\u0107, gdzie punkty na wykresie najbardziej si\u0119 pokrywaj\u0105.<\/span><\/span><\/p>\n<p> <span style=\"color: #000000;\">Mo\u017cesz pobawi\u0107 si\u0119 warto\u015bci\u0105 <strong>alfa<\/strong> w funkcji <strong>geom_point()<\/strong> , aby uzyska\u0107 poziom przezroczysto\u015bci, kt\u00f3ry u\u0142atwi czytanie wykresu.<\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>Dodatkowe zasoby<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Poni\u017csze samouczki wyja\u015bniaj\u0105, jak wykonywa\u0107 inne typowe zadania w ggplot2:<\/span><\/p>\n<p> Jak usun\u0105\u0107 etykiety osi w ggplot2<br \/> <a href=\"https:\/\/statorials.org\/pl\/usun-legende-ggplot2\/\" target=\"_blank\" rel=\"noopener\">Jak usun\u0105\u0107 legend\u0119 w ggplot2<\/a><br \/> Jak usun\u0105\u0107 linie siatki w ggplot2<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Mo\u017cesz u\u017cy\u0107 argumentu alfa w funkcji geom_point() w ggplot2, aby zmieni\u0107 przezroczysto\u015b\u0107 punkt\u00f3w na wykresie. W tym argumencie zastosowano nast\u0119puj\u0105c\u0105 podstawow\u0105 sk\u0142adni\u0119: ggplot(df, aes(x=x, y=y)) + geom_point(alpha= 1 ) Warto\u015b\u0107 alfa mo\u017ce wynosi\u0107 od 0 do 1, gdzie: 0 jest ca\u0142kowicie przezroczysty 1 jest ca\u0142kowicie solidny Domy\u015blna warto\u015b\u0107 alfa to 1 . Ustawiaj\u0105c alfa na [&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-3980","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>Jak u\u017cywa\u0107 alfa z geom_point() w ggplot2 \u2013 Statologia<\/title>\n<meta name=\"description\" content=\"W tym samouczku wyja\u015bniono, jak u\u017cywa\u0107 argumentu alfa w funkcji geom_point() w ggplot2, podaj\u0105c kilka przyk\u0142ad\u00f3w.\" \/>\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\/alfa-geom_point-ggplot2\/\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Jak u\u017cywa\u0107 alfa z geom_point() w ggplot2 \u2013 Statologia\" \/>\n<meta property=\"og:description\" content=\"W tym samouczku wyja\u015bniono, jak u\u017cywa\u0107 argumentu alfa w funkcji geom_point() w ggplot2, podaj\u0105c kilka przyk\u0142ad\u00f3w.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pl\/alfa-geom_point-ggplot2\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-14T09:17:12+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/alpha3.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=\"2 minuty\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/statorials.org\/pl\/alfa-geom_point-ggplot2\/\",\"url\":\"https:\/\/statorials.org\/pl\/alfa-geom_point-ggplot2\/\",\"name\":\"Jak u\u017cywa\u0107 alfa z geom_point() w ggplot2 \u2013 Statologia\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pl\/#website\"},\"datePublished\":\"2023-07-14T09:17:12+00:00\",\"dateModified\":\"2023-07-14T09:17:12+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/6484727a4612df3e69f016c3129c6965\"},\"description\":\"W tym samouczku wyja\u015bniono, jak u\u017cywa\u0107 argumentu alfa w funkcji geom_point() w ggplot2, podaj\u0105c kilka przyk\u0142ad\u00f3w.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pl\/alfa-geom_point-ggplot2\/#breadcrumb\"},\"inLanguage\":\"pl-PL\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pl\/alfa-geom_point-ggplot2\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pl\/alfa-geom_point-ggplot2\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Dom\",\"item\":\"https:\/\/statorials.org\/pl\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Jak u\u017cywa\u0107 alfa z geom_point() w ggplot2\"}]},{\"@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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