{"id":3204,"date":"2023-07-18T17:03:26","date_gmt":"2023-07-18T17:03:26","guid":{"rendered":"https:\/\/statorials.org\/pt\/media-numpy-vs-media\/"},"modified":"2023-07-18T17:03:26","modified_gmt":"2023-07-18T17:03:26","slug":"media-numpy-vs-media","status":"publish","type":"post","link":"https:\/\/statorials.org\/pt\/media-numpy-vs-media\/","title":{"rendered":"Numpy m\u00e9dia() vs m\u00e9dia(): qual \u00e9 a diferen\u00e7a?"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\"><span style=\"color: #000000;\">Voc\u00ea pode usar as fun\u00e7\u00f5es <strong>np.mean()<\/strong> ou <strong>np.average()<\/strong> para calcular o valor m\u00e9dio de um array em Python.<\/span><\/span><\/p>\n<p> <span style=\"color: #000000;\">Aqui est\u00e1 a diferen\u00e7a sutil entre as duas fun\u00e7\u00f5es:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><b>np.mean<\/b> sempre calcula a m\u00e9dia aritm\u00e9tica.<\/span><\/li>\n<li> <span style=\"color: #000000;\"><b>np.average<\/b> possui um par\u00e2metro <strong>de peso<\/strong> opcional que pode ser usado para calcular uma m\u00e9dia ponderada.<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">Os exemplos a seguir mostram como usar cada fun\u00e7\u00e3o na pr\u00e1tica.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Exemplo 1: Use np.mean() e np.average() sem pesos<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Suponha que temos a seguinte tabela em Python que cont\u00e9m sete valores:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #008080;\">#create array of values\n<\/span>data = [1, 4, 5, 7, 8, 8, 10]\n<\/span><\/span><\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Podemos usar <b>np.mean()<\/b> e <strong>np.average()<\/strong> para calcular o valor m\u00e9dio deste array:<\/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\n\n<\/span>#calculate average value of array\n<span style=\"color: #000000;\">n.p. <span style=\"color: #3366ff;\">mean<\/span> (data)\n\n6.142857142857143<\/span>\n\n#calculate average value of array\n<span style=\"color: #000000;\">n.p. <span style=\"color: #3366ff;\">average<\/span> (data)<\/span>\n\n<span style=\"color: #000000;\">6.142857142857143<\/span>\n<\/span><\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Ambas as fun\u00e7\u00f5es retornam exatamente o mesmo valor.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Ambas as fun\u00e7\u00f5es usaram a seguinte f\u00f3rmula para calcular a m\u00e9dia:<\/span><\/p>\n<p> <span style=\"color: #000000;\">M\u00e9dia = (1 + 4 + 5 + 7 + 8 + 8 + 10) \/ 7 = <strong>6,142857<\/strong> \u2026<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Exemplo 2: Use np.average() com pesos<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Vamos supor novamente que temos o seguinte array em Python que cont\u00e9m sete valores:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #008080;\">#create array of values\n<\/span>data = [1, 4, 5, 7, 8, 8, 10]\n<\/span><\/span><\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Podemos usar <strong>np.average()<\/strong> para calcular uma m\u00e9dia ponderada para este array, fornecendo uma lista de valores para os par\u00e2metros <strong>de peso<\/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;\">import<\/span> numpy <span style=\"color: #008000;\">as<\/span> np\n\n<\/span>#calculate weighted average of array\n<span style=\"color: #000000;\">n.p. <span style=\"color: #3366ff;\">average<\/span> (data, weights=(.1, .2, .4, .05, .05, .1, .1))<\/span>\n\n<span style=\"color: #000000;\">5.45\n<\/span><\/span><\/strong><\/pre>\n<p> <span style=\"color: #000000;\">A m\u00e9dia ponderada acabou sendo <strong>5,45<\/strong> .<\/span><\/p>\n<p> <span style=\"color: #000000;\">Aqui est\u00e1 a f\u00f3rmula usada por <strong>np.average()<\/strong> para calcular este valor:<\/span><\/p>\n<p> <span style=\"color: #000000;\">M\u00e9dia ponderada = 1*,1 + 4*,2 + 5*,4 + 7*,05 + 8*,05 + 8*,1 + 10*,1 = <strong>5,45<\/strong> .<\/span><\/p>\n<p> <span style=\"color: #000000;\">Observe que n\u00e3o poder\u00edamos usar <strong>np.mean()<\/strong> para realizar este c\u00e1lculo, pois esta fun\u00e7\u00e3o n\u00e3o possui um par\u00e2metro <strong>de peso<\/strong> .<\/span><\/p>\n<p> <span style=\"color: #000000;\">Consulte a documenta\u00e7\u00e3o do NumPy para uma explica\u00e7\u00e3o completa das fun\u00e7\u00f5es <a href=\"https:\/\/numpy.org\/doc\/stable\/reference\/generated\/numpy.mean.html\" target=\"_blank\" rel=\"noopener\">np.mean()<\/a> e <a href=\"https:\/\/numpy.org\/doc\/stable\/reference\/generated\/numpy.average.html#\" target=\"_blank\" rel=\"noopener\">np.average()<\/a> .<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Recursos adicionais<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Os tutoriais a seguir explicam como calcular outros valores m\u00e9dios em Python:<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/pt\/media-movel-python\/\" target=\"_blank\" rel=\"noopener\">Como calcular m\u00e9dias m\u00f3veis em Python<\/a><br \/> <a href=\"https:\/\/statorials.org\/pt\/media-cumulativa-python\/\" target=\"_blank\" rel=\"noopener\">Como calcular uma m\u00e9dia cumulativa em Python<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Voc\u00ea pode usar as fun\u00e7\u00f5es np.mean() ou np.average() para calcular o valor m\u00e9dio de um array em Python. Aqui est\u00e1 a diferen\u00e7a sutil entre as duas fun\u00e7\u00f5es: np.mean sempre calcula a m\u00e9dia aritm\u00e9tica. np.average possui um par\u00e2metro de peso opcional que pode ser usado para calcular uma m\u00e9dia ponderada. Os exemplos a seguir mostram como [&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-3204","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>NumPy M\u00e9dia() vs M\u00e9dia(): qual \u00e9 a diferen\u00e7a? - Estatoriais<\/title>\n<meta name=\"description\" content=\"Este tutorial explica a diferen\u00e7a entre as fun\u00e7\u00f5es NumPy Mean() e Average(), incluindo 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\/media-numpy-vs-media\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"NumPy M\u00e9dia() vs M\u00e9dia(): qual \u00e9 a diferen\u00e7a? - Estatoriais\" \/>\n<meta property=\"og:description\" content=\"Este tutorial explica a diferen\u00e7a entre as fun\u00e7\u00f5es NumPy Mean() e Average(), incluindo exemplos.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pt\/media-numpy-vs-media\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-18T17:03:26+00:00\" \/>\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\/media-numpy-vs-media\/\",\"url\":\"https:\/\/statorials.org\/pt\/media-numpy-vs-media\/\",\"name\":\"NumPy M\u00e9dia() vs M\u00e9dia(): qual \u00e9 a diferen\u00e7a? - Estatoriais\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pt\/#website\"},\"datePublished\":\"2023-07-18T17:03:26+00:00\",\"dateModified\":\"2023-07-18T17:03:26+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pt\/#\/schema\/person\/e08f98e8db95e0aa9c310e1b27c9c666\"},\"description\":\"Este tutorial explica a diferen\u00e7a entre as fun\u00e7\u00f5es NumPy Mean() e Average(), incluindo exemplos.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pt\/media-numpy-vs-media\/#breadcrumb\"},\"inLanguage\":\"pt-PT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pt\/media-numpy-vs-media\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pt\/media-numpy-vs-media\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Lar\",\"item\":\"https:\/\/statorials.org\/pt\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Numpy m\u00e9dia() vs m\u00e9dia(): qual \u00e9 a diferen\u00e7a?\"}]},{\"@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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