{"id":2869,"date":"2023-07-20T08:04:01","date_gmt":"2023-07-20T08:04:01","guid":{"rendered":"https:\/\/statorials.org\/pl\/linia-matplotlib\/"},"modified":"2023-07-20T08:04:01","modified_gmt":"2023-07-20T08:04:01","slug":"linia-matplotlib","status":"publish","type":"post","link":"https:\/\/statorials.org\/pl\/linia-matplotlib\/","title":{"rendered":"Jak korzysta\u0107 z funkcji abline w matplotlib"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Funkcji <a href=\"https:\/\/statorials.org\/pl\/abline-w-r\/\" target=\"_blank\" rel=\"noopener\">abline<\/a> w R mo\u017cna u\u017cy\u0107 do dodania linii prostej do \u015bcie\u017cki.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Niestety ta funkcja nie istnieje w Matplotlib, ale mo\u017cemy zdefiniowa\u0107 nast\u0119puj\u0105c\u0105 funkcj\u0119, aby replikowa\u0107 funkcj\u0119 abline w Pythonie:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\">import<\/span> matplotlib. <span style=\"color: #3366ff;\">pyplot<\/span> <span style=\"color: #008000;\">as<\/span> plt\n<span style=\"color: #008000;\">import<\/span> numpy <span style=\"color: #008000;\">as<\/span> np\n\n<span style=\"color: #008000;\">def<\/span> <span style=\"color: #0000ff;\">abline<\/span> (slope, intercept):\n    axes = plt. <span style=\"color: #3366ff;\">gca<\/span> ()\n    x_vals = np. <span style=\"color: #3366ff;\">array<\/span> ( <span style=\"color: #3366ff;\">axes.get_xlim<\/span> ())\n    y_vals = intercept + slope * x_vals\n    plt. <span style=\"color: #3366ff;\">plot<\/span> (x_vals, y_vals, '--')\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Poni\u017csze przyk\u0142ady pokazuj\u0105, jak w praktyce u\u017cywa\u0107 tej sk\u0142adni z nast\u0119puj\u0105c\u0105 ramk\u0105 DataFrame pand:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\">import<\/span> pandas <span style=\"color: #008000;\">as<\/span> pd\n\n<span style=\"color: #008080;\">#createDataFrame\n<\/span>df = pd. <span style=\"color: #3366ff;\">DataFrame<\/span> ({' <span style=\"color: #ff0000;\">x<\/span> ': [1, 1, 2, 3, 4, 4, 5, 6, 7, 7, 8, 9, 10, 11],\n                   ' <span style=\"color: #ff0000;\">y<\/span> ': [13, 14, 17, 12, 23, 24, 25, 25, 24, 28, 32, 33, 35, 40]})\n\n<span style=\"color: #008080;\">#view first five rows of DataFrame\n<\/span>df. <span style=\"color: #3366ff;\">head<\/span> ()\n\n\tx y\n0 1 13\n1 1 14\n2 2 17\n3 3 12\n4 4 23<\/strong><\/pre>\n<h3> <span style=\"color: #000000;\"><strong>Przyk\u0142ad 1: U\u017cycie Abline do narysowania linii poziomej<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Mo\u017cemy u\u017cy\u0107 poni\u017cszego kodu, aby narysowa\u0107 lini\u0119 poziom\u0105 za pomoc\u0105 zdefiniowanej wcze\u015bniej funkcji <strong>abline<\/strong> :<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#create scatterplot\n<\/span>plt. <span style=\"color: #3366ff;\">scatter<\/span> (df. <span style=\"color: #3366ff;\">x<\/span> , df. <span style=\"color: #3366ff;\">y<\/span> )\n\n<span style=\"color: #008080;\">#add horizontal line at y=30\n<\/span>abline( <span style=\"color: #008000;\">0,30<\/span> <span style=\"color: #008000;\">)<\/span><\/strong> <\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-25090 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/abline1-1.jpg\" alt=\"\" width=\"566\" height=\"379\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">Rezultatem jest pozioma linia w punkcie y=30.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Przyk\u0142ad 2: U\u017cyj aline, aby narysowa\u0107 lini\u0119 o okre\u015blonym nachyleniu i przeci\u0119ciu<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Mo\u017cemy u\u017cy\u0107 poni\u017cszego kodu, aby narysowa\u0107 lini\u0119 o nachyleniu <strong>3<\/strong> i punkcie przeci\u0119cia z osi\u0105 y r\u00f3wnym <strong>15<\/strong> :<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#create scatterplot\n<\/span>plt. <span style=\"color: #3366ff;\">scatter<\/span> (df. <span style=\"color: #3366ff;\">x<\/span> , df. <span style=\"color: #3366ff;\">y<\/span> )\n\n<span style=\"color: #008080;\">#add straight line with slope=3 and intercept=15\n<\/span>abline( <span style=\"color: #008000;\">3,15<\/span> <span style=\"color: #008000;\">)<\/span><\/strong> <\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-25092 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/abline3-1.jpg\" alt=\"\" width=\"541\" height=\"360\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">Rezultatem jest linia prosta o nachyleniu 3 i przeci\u0119ciu 15.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Przyk\u0142ad 3: U\u017cyj abline do wykre\u015blenia linii regresji<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Mo\u017cemy u\u017cy\u0107 poni\u017cszego kodu do wykre\u015blenia linii regresji za pomoc\u0105 zdefiniowanej wcze\u015bniej funkcji <strong>abline<\/strong> :<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#calculate slope and intercept of regression line\n<span style=\"color: #000000;\">slope = np. <span style=\"color: #3366ff;\">polyfit<\/span> (df. <span style=\"color: #3366ff;\">x<\/span> , df. <span style=\"color: #3366ff;\">y<\/span> , 1)[ <span style=\"color: #008000;\">0<\/span> ]<\/span>\n<span style=\"color: #000000;\">intercept = np. <span style=\"color: #3366ff;\">polyfit<\/span> (df. <span style=\"color: #3366ff;\">x<\/span> , df. <span style=\"color: #3366ff;\">y<\/span> , 1)[ <span style=\"color: #008000;\">1<\/span> ]<\/span>\n\n#create scatterplot\n<\/span>plt. <span style=\"color: #3366ff;\">scatter<\/span> (df. <span style=\"color: #3366ff;\">x<\/span> , df. <span style=\"color: #3366ff;\">y<\/span> )\n\n<span style=\"color: #008080;\">#add regression line\n<\/span><span style=\"color: #000000;\">abline(slope, intercept)<\/span><\/strong> <\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-25091 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/abline2-1.jpg\" alt=\"\" width=\"544\" height=\"362\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">Rezultatem jest dopasowana linia regresji, kt\u00f3ra przechodzi bezpo\u015brednio przez punkty wykresu.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>Uwaga<\/strong> : pe\u0142n\u0105 dokumentacj\u0119 funkcji <strong>Polyfit<\/strong> w NumPy znajdziesz <a href=\"https:\/\/numpy.org\/doc\/stable\/reference\/generated\/numpy.polyfit.html\" target=\"_blank\" rel=\"noopener\">tutaj<\/a> .<\/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 pandach:<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/pl\/kolumny-sumy-specyficzne-dla-pand\/\" target=\"_blank\" rel=\"noopener\">Jak sumowa\u0107 okre\u015blone kolumny w Pandach<\/a><br \/> <a href=\"https:\/\/statorials.org\/pl\/kolumna-sumy-pand-z-warunkiem\/\" target=\"_blank\" rel=\"noopener\">Jak sumowa\u0107 kolumny na podstawie warunku w Pandach<\/a><br \/> <a href=\"https:\/\/statorials.org\/pl\/pandy-odwroc-cumsum\/\" target=\"_blank\" rel=\"noopener\">Jak obliczy\u0107 odwrotn\u0105 sum\u0119 skumulowan\u0105 w pandach<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Funkcji abline w R mo\u017cna u\u017cy\u0107 do dodania linii prostej do \u015bcie\u017cki. Niestety ta funkcja nie istnieje w Matplotlib, ale mo\u017cemy zdefiniowa\u0107 nast\u0119puj\u0105c\u0105 funkcj\u0119, aby replikowa\u0107 funkcj\u0119 abline w Pythonie: import matplotlib. pyplot as plt import numpy as np def abline (slope, intercept): axes = plt. gca () x_vals = np. array ( axes.get_xlim ()) [&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-2869","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 korzysta\u0107 z funkcji abline w Matplotlib \u2013 Statologia<\/title>\n<meta name=\"description\" content=\"W tym samouczku wyja\u015bniono, jak utworzy\u0107 funkcj\u0119 abline w Matplotlib podobn\u0105 do tej u\u017cywanej w R, wraz z 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\/linia-matplotlib\/\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Jak korzysta\u0107 z funkcji abline w Matplotlib \u2013 Statologia\" \/>\n<meta property=\"og:description\" content=\"W tym samouczku wyja\u015bniono, jak utworzy\u0107 funkcj\u0119 abline w Matplotlib podobn\u0105 do tej u\u017cywanej w R, wraz z przyk\u0142adem.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pl\/linia-matplotlib\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-20T08:04:01+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/abline1-1.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=\"2 minuty\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/statorials.org\/pl\/linia-matplotlib\/\",\"url\":\"https:\/\/statorials.org\/pl\/linia-matplotlib\/\",\"name\":\"Jak korzysta\u0107 z funkcji abline w Matplotlib \u2013 Statologia\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pl\/#website\"},\"datePublished\":\"2023-07-20T08:04:01+00:00\",\"dateModified\":\"2023-07-20T08:04:01+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/6484727a4612df3e69f016c3129c6965\"},\"description\":\"W tym samouczku wyja\u015bniono, jak utworzy\u0107 funkcj\u0119 abline w Matplotlib podobn\u0105 do tej u\u017cywanej w R, wraz z przyk\u0142adem.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pl\/linia-matplotlib\/#breadcrumb\"},\"inLanguage\":\"pl-PL\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pl\/linia-matplotlib\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pl\/linia-matplotlib\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Dom\",\"item\":\"https:\/\/statorials.org\/pl\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Jak korzysta\u0107 z funkcji abline w matplotlib\"}]},{\"@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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