{"id":2459,"date":"2023-07-22T04:35:15","date_gmt":"2023-07-22T04:35:15","guid":{"rendered":"https:\/\/statorials.org\/it\/analisi-univariata-in-python\/"},"modified":"2023-07-22T04:35:15","modified_gmt":"2023-07-22T04:35:15","slug":"analisi-univariata-in-python","status":"publish","type":"post","link":"https:\/\/statorials.org\/it\/analisi-univariata-in-python\/","title":{"rendered":"Come eseguire l&#39;analisi univariata in python: con esempi"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Il termine <a href=\"https:\/\/statorials.org\/it\/analisi-invariate\/\" target=\"_blank\" rel=\"noopener\">analisi univariata<\/a> si riferisce all&#8217;analisi di una variabile. Puoi ricordarlo perch\u00e9 il prefisso \u201cuni\u201d significa \u201cuno\u201d.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Esistono tre modi comuni per eseguire l&#8217;analisi univariata su una variabile:<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>1. Statistiche riassuntive<\/strong> : misura il centro e la distribuzione dei valori.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>2. Tabella delle frequenze<\/strong> : descrive la frequenza con cui compaiono valori diversi.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>3. Grafici<\/strong> \u2013 Utilizzati per visualizzare la distribuzione dei valori.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Questo tutorial fornisce un esempio di come eseguire analisi univariate con il seguente DataFrame panda:<\/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;\">points<\/span> ': [1, 1, 2, 3.5, 4, 4, 4, 5, 5, 6.5, 7, 7.4, 8, 13, 14.2],\n                   ' <span style=\"color: #ff0000;\">assists<\/span> ': [5, 7, 7, 9, 12, 9, 9, 4, 6, 8, 8, 9, 3, 2, 6],\n                   ' <span style=\"color: #ff0000;\">rebounds<\/span> ': [11, 8, 10, 6, 6, 5, 9, 12, 6, 6, 7, 8, 7, 9, 15]})\n\n<span style=\"color: #008080;\">#view first five rows of DataFrame<\/span>\ndf. <span style=\"color: #3366ff;\">head<\/span> ()\n\n\tpoints assists rebounds\n0 1.0 5 11\n1 1.0 7 8\n2 2.0 7 10\n3 3.5 9 6\n4 4.0 12 6\n<\/strong><\/pre>\n<h3> <span style=\"color: #000000;\"><strong>1. Calcola statistiche riassuntive<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Possiamo utilizzare la seguente sintassi per calcolare varie statistiche riassuntive per la variabile &#8220;punti&#8221; nel DataFrame:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#calculate mean of 'points'<\/span>\ndf[' <span style=\"color: #ff0000;\">points<\/span> ']. <span style=\"color: #3366ff;\">mean<\/span> ()\n\n5.706666666666667\n\n<span style=\"color: #008080;\">#calculate median of 'points' \n<\/span>df[' <span style=\"color: #ff0000;\">points<\/span> ']. <span style=\"color: #3366ff;\">median<\/span> () \n\n5.0\n\n<span style=\"color: #008080;\">#calculate standard deviation of 'points'\n<\/span>df[' <span style=\"color: #ff0000;\">points<\/span> ']. <span style=\"color: #3366ff;\">std<\/span> () \n\n3.858287308169384\n<\/strong><\/pre>\n<h3> <span style=\"color: #000000;\"><strong>2. Crea una tabella di frequenza<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Possiamo usare la seguente sintassi per creare una tabella di frequenza per la variabile &#8220;punti&#8221;:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#create frequency table for 'points'<\/span>\ndf[' <span style=\"color: #ff0000;\">points<\/span> ']. <span style=\"color: #3366ff;\">value_counts<\/span> ()\n\n4.0 3\n1.0 2\n5.0 2\n2.0 1\n3.5 1\n6.5 1\n7.0 1\n7.4 1\n8.0 1\n13.0 1\n14.2 1\nName: points, dtype: int64<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Questo ci dice che:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">Il valore <strong>4<\/strong> appare 3 volte<\/span><\/li>\n<li> <span style=\"color: #000000;\">Il valore <strong>1<\/strong> appare due volte<\/span><\/li>\n<li> <span style=\"color: #000000;\">Il valore <strong>5<\/strong> appare due volte<\/span><\/li>\n<li> <span style=\"color: #000000;\">Il valore <strong>2<\/strong> appare 1 volta<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">E cos\u00ec via.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>Correlato:<\/strong> <a href=\"https:\/\/statorials.org\/it\/tabelle-di-frequenza-python\/\" target=\"_blank\" rel=\"noopener\">Come creare tabelle di frequenza in Python<\/a><\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>3. Crea grafici<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Possiamo usare la seguente sintassi per creare un <a href=\"https:\/\/statorials.org\/it\/baffi-di-scatola\/\" target=\"_blank\" rel=\"noopener\">boxplot<\/a> per la variabile &#8216;points&#8217;:<\/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\ndf. <span style=\"color: #3366ff;\">boxplot<\/span> (column=[' <span style=\"color: #ff0000;\">points<\/span> '], grid= <span style=\"color: #008000;\">False<\/span> , color=' <span style=\"color: #ff0000;\">black<\/span> ')\n<\/strong><\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-22042 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/uni11.png\" alt=\"\" width=\"500\" height=\"332\" srcset=\"\" sizes=\"\"><\/p>\n<p> <span style=\"color: #000000;\"><strong>Correlato:<\/strong> <a href=\"https:\/\/statorials.org\/it\/panda-in-scatola\/\" target=\"_blank\" rel=\"noopener\">Come creare un boxplot da Pandas DataFrame<\/a><\/span><\/p>\n<p> <span style=\"color: #000000;\">Possiamo usare la seguente sintassi per creare un istogramma per la variabile &#8216;punti&#8217;:<\/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\ndf. <span style=\"color: #3366ff;\">hist<\/span> (column=' <span style=\"color: #ff0000;\">points<\/span> ', grid= <span style=\"color: #008000;\">False<\/span> , edgecolor=' <span style=\"color: #ff0000;\">black<\/span> ')\n<\/strong><\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-22043 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/uni12.png\" alt=\"\" width=\"510\" height=\"361\" srcset=\"\" sizes=\"\"><\/p>\n<p> <span style=\"color: #000000;\"><strong>Correlato:<\/strong> <a href=\"https:\/\/statorials.org\/it\/istogramma-del-panda\/\" target=\"_blank\" rel=\"noopener\">Come creare un istogramma da Pandas DataFrame<\/a><\/span><\/p>\n<p> <span style=\"color: #000000;\">Possiamo usare la seguente sintassi per creare una <a href=\"https:\/\/statorials.org\/it\/curve-di-densita\/\" target=\"_blank\" rel=\"noopener\">curva di densit\u00e0<\/a> per la variabile &#8220;punti&#8221;:<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\">import<\/span> seaborn <span style=\"color: #008000;\">as<\/span> sns\n\nsns. <span style=\"color: #3366ff;\">kdeplot<\/span> (df[' <span style=\"color: #ff0000;\">points<\/span> '])\n<\/strong><\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-22044 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/uni13.png\" alt=\"\" width=\"535\" height=\"352\" srcset=\"\" sizes=\"\"><\/p>\n<p> <span style=\"color: #000000;\"><strong>Correlato:<\/strong> <a href=\"https:\/\/statorials.org\/it\/grafico-della-densita-matplotlib\/\" target=\"_blank\" rel=\"noopener\">Come creare un grafico della densit\u00e0 in Matplotlib<\/a><\/span><\/p>\n<p> <span style=\"color: #000000;\">Ciascuno di questi grafici ci offre un modo unico di visualizzare la distribuzione dei valori della variabile \u201cpunti\u201d.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Il termine analisi univariata si riferisce all&#8217;analisi di una variabile. Puoi ricordarlo perch\u00e9 il prefisso \u201cuni\u201d significa \u201cuno\u201d. Esistono tre modi comuni per eseguire l&#8217;analisi univariata su una variabile: 1. Statistiche riassuntive : misura il centro e la distribuzione dei valori. 2. Tabella delle frequenze : descrive la frequenza con cui compaiono valori diversi. 3. [&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":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Come eseguire l&#039;analisi univariata in Python (con esempi) - Statorials<\/title>\n<meta name=\"description\" content=\"Questo tutorial spiega come eseguire l&#039;analisi univariata in Python, con diversi esempi.\" \/>\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\/it\/analisi-univariata-in-python\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Come eseguire l&#039;analisi univariata in Python (con esempi) - Statorials\" \/>\n<meta property=\"og:description\" content=\"Questo tutorial spiega come eseguire l&#039;analisi univariata in Python, con diversi esempi.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/it\/analisi-univariata-in-python\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-22T04:35:15+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/uni11.png\" \/>\n<meta name=\"author\" content=\"Benjamin anderson\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Benjamin anderson\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minuti\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/statorials.org\/it\/analisi-univariata-in-python\/\",\"url\":\"https:\/\/statorials.org\/it\/analisi-univariata-in-python\/\",\"name\":\"Come eseguire l&#39;analisi univariata in Python (con esempi) - Statorials\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/it\/#website\"},\"datePublished\":\"2023-07-22T04:35:15+00:00\",\"dateModified\":\"2023-07-22T04:35:15+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/it\/#\/schema\/person\/0896f191fb9fb019f2cd8623112cb3ae\"},\"description\":\"Questo tutorial spiega come eseguire l&#39;analisi univariata in Python, con diversi esempi.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/it\/analisi-univariata-in-python\/#breadcrumb\"},\"inLanguage\":\"it-IT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/it\/analisi-univariata-in-python\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/it\/analisi-univariata-in-python\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Casa\",\"item\":\"https:\/\/statorials.org\/it\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Come eseguire l&#39;analisi univariata in python: con esempi\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/statorials.org\/it\/#website\",\"url\":\"https:\/\/statorials.org\/it\/\",\"name\":\"Statorials\",\"description\":\"La tua guida all&#039;alfabetizzazione statistica!\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/statorials.org\/it\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"it-IT\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/statorials.org\/it\/#\/schema\/person\/0896f191fb9fb019f2cd8623112cb3ae\",\"name\":\"Benjamin anderson\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"it-IT\",\"@id\":\"https:\/\/statorials.org\/it\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/statorials.org\/it\/wp-content\/uploads\/2023\/10\/Dr.-Benjamin-Anderson-96x96.jpg\",\"contentUrl\":\"https:\/\/statorials.org\/it\/wp-content\/uploads\/2023\/10\/Dr.-Benjamin-Anderson-96x96.jpg\",\"caption\":\"Benjamin anderson\"},\"description\":\"Ciao, sono Benjamin, un professore di statistica in pensione diventato insegnante dedicato di Statorials. 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