{"id":1649,"date":"2023-07-25T12:44:47","date_gmt":"2023-07-25T12:44:47","guid":{"rendered":"https:\/\/statorials.org\/pt\/log-log-plot-python\/"},"modified":"2023-07-25T12:44:47","modified_gmt":"2023-07-25T12:44:47","slug":"log-log-plot-python","status":"publish","type":"post","link":"https:\/\/statorials.org\/pt\/log-log-plot-python\/","title":{"rendered":"Como criar um gr\u00e1fico log-log em python"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Um <strong>gr\u00e1fico log-log<\/strong> \u00e9 um gr\u00e1fico que usa escalas logar\u00edtmicas no eixo x e no eixo y.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Este tipo de gr\u00e1fico \u00e9 \u00fatil para visualizar duas vari\u00e1veis quando a verdadeira rela\u00e7\u00e3o entre elas segue algum tipo de lei de pot\u00eancia.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Este tutorial explica como criar um gr\u00e1fico log-log em Python.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Como criar um gr\u00e1fico Log-Log em Python<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Suponha que temos o seguinte DataFrame do pandas:<\/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<span style=\"color: #008000;\">import<\/span> matplotlib. <span style=\"color: #3366ff;\">pyplot<\/span> <span style=\"color: #008000;\">as<\/span> plt\n\n<span style=\"color: #008080;\">#createDataFrame\n<\/span>df = pd. <span style=\"color: #3366ff;\">DataFrame<\/span> ({' <span style=\"color: #ff0000;\">x<\/span> ': [3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13,\n                         14, 15, 16, 17, 18, 19, 20, 21, 22],\n                   ' <span style=\"color: #ff0000;\">y<\/span> ': [3, 4, 5, 7, 9, 13, 15, 19, 23, 24, 29,\n                         38, 40, 50, 56, 59, 70, 89, 104, 130]})\n\n<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<\/strong><\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-16266 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/loglogpython1.png\" alt=\"\" width=\"535\" height=\"369\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">\u00c9 claro que a rela\u00e7\u00e3o entre <em>x<\/em> e <em>y<\/em> segue uma lei de pot\u00eancia.<\/span><\/p>\n<p> <span style=\"color: #000000;\">O c\u00f3digo a seguir mostra como usar <strong>numpy.log()<\/strong> para realizar uma transforma\u00e7\u00e3o de log nas duas vari\u00e1veis e criar um gr\u00e1fico log-log para visualizar o relacionamento entre elas:<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #008000;\">import<\/span> numpy <span style=\"color: #008000;\">as<\/span> np<\/span>\n\n#perform log transformation on both x and y\n<\/span>xlog = np. <span style=\"color: #3366ff;\">log<\/span> ( <span style=\"color: #3366ff;\">df.x<\/span> )\nylog = np. <span style=\"color: #3366ff;\">log<\/span> ( <span style=\"color: #3366ff;\">df.y<\/span> )\n\n<span style=\"color: #008080;\">#create log-log plot\n<\/span>plt. <span style=\"color: #3366ff;\">scatter<\/span> (xlog, ylog)\n<\/strong><\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-16267 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/loglogpython2.png\" alt=\"\" width=\"530\" height=\"372\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">O eixo x exibe o logaritmo de x e o eixo y exibe o logaritmo de y.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Observe como a rela\u00e7\u00e3o entre log(x) e log(y) \u00e9 muito mais linear em compara\u00e7\u00e3o com o gr\u00e1fico anterior.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Sinta-se \u00e0 vontade para adicionar um t\u00edtulo e r\u00f3tulos de eixo para facilitar a interpreta\u00e7\u00e3o do gr\u00e1fico:<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#create log-log plot with labels\n<span style=\"color: #000000;\">plt. <span style=\"color: #3366ff;\">scatter<\/span> (xlog, ylog, color=' <span style=\"color: #ff0000;\">purple<\/span> ')\nplt. <span style=\"color: #3366ff;\">xlabel<\/span> (' <span style=\"color: #ff0000;\">Log(x)<\/span> ')\nplt. <span style=\"color: #3366ff;\">ylabel<\/span> (' <span style=\"color: #ff0000;\">Log(y)<\/span> ')\nplt. <span style=\"color: #3366ff;\">title<\/span> (' <span style=\"color: #ff0000;\">Log-Log Plot<\/span> ')<\/span><\/span><\/strong> <\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-16268 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/loglogpython3.png\" alt=\"\" width=\"534\" height=\"390\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">Observe tamb\u00e9m que voc\u00ea pode criar um gr\u00e1fico de linhas em vez de um gr\u00e1fico de dispers\u00e3o simplesmente usando <strong>plt.plot()<\/strong> da seguinte forma:<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#create log-log line plot\n<span style=\"color: #000000;\">plt. <span style=\"color: #3366ff;\">plot<\/span> (xlog, ylog, color=' <span style=\"color: #ff0000;\">purple<\/span> ')\nplt. <span style=\"color: #3366ff;\">xlabel<\/span> (' <span style=\"color: #ff0000;\">Log(x)<\/span> ')\nplt. <span style=\"color: #3366ff;\">ylabel<\/span> (' <span style=\"color: #ff0000;\">Log(y)<\/span> ')\nplt. <span style=\"color: #3366ff;\">title<\/span> (' <span style=\"color: #ff0000;\">Log-Log Plot<\/span> ')<\/span><\/span><\/strong> <\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-16274\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/loglogpython4.png\" alt=\"Gr\u00e1fico Log-Log em Python\" width=\"537\" height=\"382\" srcset=\"\" sizes=\"auto, \"><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Recursos adicionais<\/strong><\/span><\/h3>\n<p> <a href=\"https:\/\/statorials.org\/pt\/log-grafico-de-log-em-r\/\" target=\"_blank\" rel=\"noopener\">Como criar um gr\u00e1fico log-log em R<\/a><br \/> <a href=\"https:\/\/statorials.org\/pt\/log-grafico-de-log-excel\/\" target=\"_blank\" rel=\"noopener\">Como criar um gr\u00e1fico Log-Log no Excel<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Um gr\u00e1fico log-log \u00e9 um gr\u00e1fico que usa escalas logar\u00edtmicas no eixo x e no eixo y. Este tipo de gr\u00e1fico \u00e9 \u00fatil para visualizar duas vari\u00e1veis quando a verdadeira rela\u00e7\u00e3o entre elas segue algum tipo de lei de pot\u00eancia. Este tutorial explica como criar um gr\u00e1fico log-log em Python. Como criar um gr\u00e1fico Log-Log [&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":[],"class_list":["post-1649","post","type-post","status-publish","format-standard","hentry","category-guia"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Como criar um gr\u00e1fico Log-Log em Python<\/title>\n<meta name=\"description\" content=\"Este tutorial explica como criar um gr\u00e1fico log-log em Python, com v\u00e1rios exemplos.\" \/>\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\/pt\/log-log-plot-python\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Como criar um gr\u00e1fico Log-Log em Python\" \/>\n<meta property=\"og:description\" content=\"Este tutorial explica como criar um gr\u00e1fico log-log em Python, com v\u00e1rios exemplos.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pt\/log-log-plot-python\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-25T12:44:47+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/loglogpython1.png\" \/>\n<meta name=\"author\" content=\"Dr. benjamim anderson\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Escrito por\" \/>\n\t<meta name=\"twitter:data1\" content=\"Dr. benjamim anderson\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tempo estimado de leitura\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/statorials.org\/pt\/log-log-plot-python\/\",\"url\":\"https:\/\/statorials.org\/pt\/log-log-plot-python\/\",\"name\":\"Como criar um gr\u00e1fico Log-Log em Python\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pt\/#website\"},\"datePublished\":\"2023-07-25T12:44:47+00:00\",\"dateModified\":\"2023-07-25T12:44:47+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pt\/#\/schema\/person\/e08f98e8db95e0aa9c310e1b27c9c666\"},\"description\":\"Este tutorial explica como criar um gr\u00e1fico log-log em Python, com v\u00e1rios exemplos.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pt\/log-log-plot-python\/#breadcrumb\"},\"inLanguage\":\"pt-PT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pt\/log-log-plot-python\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pt\/log-log-plot-python\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Lar\",\"item\":\"https:\/\/statorials.org\/pt\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Como criar um gr\u00e1fico log-log em python\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/statorials.org\/pt\/#website\",\"url\":\"https:\/\/statorials.org\/pt\/\",\"name\":\"Statorials\",\"description\":\"O seu guia para a literacia estat\u00edstica!\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/statorials.org\/pt\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"pt-PT\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/statorials.org\/pt\/#\/schema\/person\/e08f98e8db95e0aa9c310e1b27c9c666\",\"name\":\"Dr. benjamim anderson\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"pt-PT\",\"@id\":\"https:\/\/statorials.org\/pt\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/statorials.org\/pt\/wp-content\/uploads\/2023\/10\/Dr.-Benjamin-Anderson-96x96.jpg\",\"contentUrl\":\"https:\/\/statorials.org\/pt\/wp-content\/uploads\/2023\/10\/Dr.-Benjamin-Anderson-96x96.jpg\",\"caption\":\"Dr. benjamim anderson\"},\"description\":\"Ol\u00e1, sou Benjamin, um professor aposentado de estat\u00edstica que se tornou professor dedicado na Statorials. 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