{"id":1936,"date":"2023-07-24T09:32:53","date_gmt":"2023-07-24T09:32:53","guid":{"rendered":"https:\/\/statorials.org\/pt\/media-geometrica-python\/"},"modified":"2023-07-24T09:32:53","modified_gmt":"2023-07-24T09:32:53","slug":"media-geometrica-python","status":"publish","type":"post","link":"https:\/\/statorials.org\/pt\/media-geometrica-python\/","title":{"rendered":"Como calcular a m\u00e9dia geom\u00e9trica em python (com exemplos)"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Existem duas maneiras de calcular a m\u00e9dia geom\u00e9trica em Python:<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>M\u00e9todo 1: calcular a m\u00e9dia geom\u00e9trica usando SciPy<\/strong><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\">from<\/span> scipy. <span style=\"color: #3366ff;\">stats<\/span> <span style=\"color: #008000;\">import<\/span> gmean\n\n<span style=\"color: #008080;\">#calculate geometric mean\n<\/span>gmean([value1, value2, value3, ...])\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><strong>M\u00e9todo 2: calcular a m\u00e9dia geom\u00e9trica usando NumPy<\/strong><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #000000;\"><span style=\"color: #008000;\">import<\/span> numpy <span style=\"color: #008000;\">as<\/span> np\n\n<span style=\"color: #008080;\">#define custom function\n<\/span><span style=\"color: #008000;\">def<\/span> g_mean(x):\n    a = np. <span style=\"color: #3366ff;\">log<\/span> (x)\n    <span style=\"color: #008000;\">return<\/span> np. <span style=\"color: #3366ff;\">exp<\/span> ( <span style=\"color: #3366ff;\">a.mean<\/span> ())\n\n<span style=\"color: #008080;\">#calculate geometric mean<\/span>\ng_mean([value1, value2, value3, ...])<\/span><\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Ambos os m\u00e9todos retornar\u00e3o exatamente os mesmos resultados.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Os exemplos a seguir mostram como usar cada um desses m\u00e9todos na pr\u00e1tica.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Exemplo 1: Calcular a m\u00e9dia geom\u00e9trica usando SciPy<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">O c\u00f3digo a seguir mostra como usar a fun\u00e7\u00e3o <strong>gmean()<\/strong> da biblioteca <a href=\"https:\/\/www.scipy.org\/\" target=\"_blank\" rel=\"noopener\">SciPy<\/a> para calcular a m\u00e9dia geom\u00e9trica de uma matriz de valores:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\">from<\/span> scipy. <span style=\"color: #3366ff;\">stats<\/span> <span style=\"color: #008000;\">import<\/span> gmean\n\n<span style=\"color: #008080;\">#calculate geometric mean\n<\/span>gmean([1, 4, 7, 6, 6, 4, 8, 9])\n\n4.81788719702029\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">A m\u00e9dia geom\u00e9trica acaba sendo <strong>4,8179<\/strong> .<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Exemplo 2: Calcular a m\u00e9dia geom\u00e9trica usando NumPy<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">O c\u00f3digo a seguir demonstra como escrever uma fun\u00e7\u00e3o personalizada para calcular uma m\u00e9dia geom\u00e9trica usando as fun\u00e7\u00f5es integradas da biblioteca <a href=\"https:\/\/numpy.org\/\" target=\"_blank\" rel=\"noopener\">NumPy<\/a> :<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #000000;\"><span style=\"color: #008000;\">import<\/span> numpy <span style=\"color: #008000;\">as<\/span> np\n\n<span style=\"color: #008080;\">#define custom function\n<\/span><span style=\"color: #008000;\">def<\/span> g_mean(x):\n    a = np. <span style=\"color: #3366ff;\">log<\/span> (x)\n<span style=\"color: #008000;\">return<\/span> np. <span style=\"color: #3366ff;\">exp<\/span> ( <span style=\"color: #3366ff;\">a.mean<\/span> ())\n\n<span style=\"color: #008080;\">#calculate geometric mean\n<\/span>g_mean([1, 4, 7, 6, 6, 4, 8, 9])\n\n4.81788719702029<\/span>\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">A m\u00e9dia geom\u00e9trica acaba sendo <strong>4,8179<\/strong> , o que corresponde ao resultado do exemplo anterior.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Como lidar com zeros<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Observe que ambos os m\u00e9todos retornar\u00e3o zero se houver zeros no array com o qual voc\u00ea est\u00e1 trabalhando.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Portanto, voc\u00ea pode usar o seguinte trecho de c\u00f3digo para remover zeros de uma matriz antes de calcular a m\u00e9dia geom\u00e9trica:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #000000;\"><span style=\"color: #008080;\">#create array with some zeros\n<\/span>x = [1, 0, 0, 6, 6, 0, 8, 9]\n\n<span style=\"color: #008080;\">#remove zeros from array \n<\/span>x_new = [i <span style=\"color: #008000;\">for<\/span> i <span style=\"color: #008000;\">in<\/span> x <span style=\"color: #008000;\">if<\/span> i != 0]\n\n<span style=\"color: #008080;\">#view updated array\n<\/span><span style=\"color: #993300;\">print<\/span> (x_new)\n\n[1, 6, 6, 8, 9]\n<\/span><\/strong><\/pre>\n<h3> <span style=\"color: #000000;\"><strong>Recursos adicionais<\/strong><\/span><\/h3>\n<p> <a href=\"https:\/\/statorials.org\/pt\/significa-erro-quadrado-python\/\" target=\"_blank\" rel=\"noopener\">Como calcular o erro quadr\u00e1tico m\u00e9dio (MSE) em Python<\/a><br \/> <a href=\"https:\/\/statorials.org\/pt\/significa-erro-absoluto-python\/\" target=\"_blank\" rel=\"noopener\">Como calcular o erro m\u00e9dio absoluto em Python<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Existem duas maneiras de calcular a m\u00e9dia geom\u00e9trica em Python: M\u00e9todo 1: calcular a m\u00e9dia geom\u00e9trica usando SciPy from scipy. stats import gmean #calculate geometric mean gmean([value1, value2, value3, &#8230;]) M\u00e9todo 2: calcular a m\u00e9dia geom\u00e9trica usando NumPy import numpy as np #define custom function def g_mean(x): a = np. log (x) return np. exp [&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-1936","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 calcular a m\u00e9dia geom\u00e9trica em Python (com exemplos) - Estatologia<\/title>\n<meta name=\"description\" content=\"Este tutorial explica como calcular a m\u00e9dia geom\u00e9trica de um 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