{"id":3242,"date":"2023-07-18T12:33:46","date_gmt":"2023-07-18T12:33:46","guid":{"rendered":"https:\/\/statorials.org\/it\/filtro-digitale\/"},"modified":"2023-07-18T12:33:46","modified_gmt":"2023-07-18T12:33:46","slug":"filtro-digitale","status":"publish","type":"post","link":"https:\/\/statorials.org\/it\/filtro-digitale\/","title":{"rendered":"Come filtrare un array numpy (4 esempi)"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">\u00c8 possibile utilizzare i seguenti metodi per filtrare i valori di un array NumPy:<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>Metodo 1: filtra i valori in base a una singola condizione<\/strong><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#filter for values less than 5<\/span>\nmy_array[my_array &lt; <span style=\"color: #008000;\">5<\/span> ]\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><strong>Metodo 2: filtrare i valori utilizzando la condizione &#8220;OR&#8221;.<\/strong><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#filter for values less than 5 <em>or<\/em> greater than 9<\/span>\nmy_array[(my_array &lt; <span style=\"color: #008000;\">5<\/span> ) | (my_array &gt; <span style=\"color: #008000;\">9<\/span> )]\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><strong>Metodo 3: filtrare i valori utilizzando la condizione &#8220;AND&#8221;.<\/strong><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#filter for values greater than 5 <i>and<\/i> less than 9<\/span>\nmy_array[(my_array &gt; <span style=\"color: #008000;\">5<\/span> ) &amp; (my_array &lt; <span style=\"color: #008000;\">9<\/span> )]<\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><strong>Metodo 4: filtra i valori contenuti nell&#8217;elenco<\/strong><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#filter for values that are equal to 2, 3, 5, or 12<\/span>\nmy_array[np. <span style=\"color: #3366ff;\">in1d<\/span> (my_array, [2, 3, 5, 12])]\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Questo tutorial spiega come utilizzare in pratica ciascun metodo con il seguente array NumPy:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong><span style=\"color: #008000;\">import<\/span> numpy <span style=\"color: #008000;\">as<\/span> np\n\n<span style=\"color: #008080;\">#create NumPy array\n<\/span>my_array = np. <span style=\"color: #3366ff;\">array<\/span> ([1, 2, 2, 3, 5, 6, 7, 10, 12, 14])\n\n<span style=\"color: #008080;\">#view NumPy array<\/span>\nmy_array\n\narray([ 1, 2, 2, 3, 5, 6, 7, 10, 12, 14])\n<\/strong><\/span><\/pre>\n<h2> <span style=\"color: #000000;\"><strong>Esempio 1: filtrare i valori in base a una condizione<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Il codice seguente mostra come filtrare i valori dell&#8217;array NumPy in base a una singola condizione:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#filter for values less than 5\n<\/span>my_array[(my_array &lt; <span style=\"color: #008000;\">5<\/span> )]\n\narray([1, 2, 2, 3])\n\n<span style=\"color: #008080;\">#filter for values greater than 5\n<\/span>my_array[(my_array &gt; <span style=\"color: #008000;\">5<\/span> )]\n\narray([6,7,10,12,14])\n\n<span style=\"color: #008080;\">#filter for values equal to 5\n<\/span>my_array[(my_array == <span style=\"color: #008000;\">5<\/span> )]\n\narray([5])\n<\/strong><\/pre>\n<h2> <span style=\"color: #000000;\"><strong>Esempio 2: filtrare i valori utilizzando la condizione &#8220;OR&#8221;.<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Il codice seguente mostra come filtrare i valori dell&#8217;array NumPy utilizzando una condizione &#8220;OR&#8221;:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#filter for values less than 5 <em>or<\/em> greater than 9<\/span>\nmy_array[(my_array &lt; <span style=\"color: #008000;\">5<\/span> ) | (my_array &gt; <span style=\"color: #008000;\">9<\/span> )]\n\narray([ 1, 2, 2, 3, 10, 12, 14])\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Questo filtro restituisce valori dell&#8217;array NumPy inferiori a 5 <strong>o<\/strong> superiori a 9.<\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>Esempio 3: filtrare i valori utilizzando la condizione \u201cAND\u201d.<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Il codice seguente mostra come filtrare i valori dell&#8217;array NumPy utilizzando una condizione &#8220;AND&#8221;:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#filter for values greater than 5 <i>and<\/i> less than 9<\/span>\nmy_array[(my_array &gt; <span style=\"color: #008000;\">5<\/span> ) &amp; (my_array &lt; <span style=\"color: #008000;\">9<\/span> )]\n\narray([6, 7])\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Questo filtro restituisce valori dall&#8217;array NumPy maggiori di 5 <b>e<\/b> minori di 9.<\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>Esempio 4: filtrare i valori contenuti nella lista<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Il codice seguente mostra come filtrare i valori dell&#8217;array NumPy contenuti in un elenco:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#filter for values that are equal to 2, 3, 5, or 12<\/span>\nmy_array[np. <span style=\"color: #3366ff;\">in1d<\/span> (my_array, [2, 3, 5, 12])]\n\narray([ 2, 2, 3, 5, 12])\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Questo filtro restituisce solo valori pari a 2, 3, 5 o 12.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>Nota<\/strong> : puoi trovare la documentazione completa per la funzione NumPy <strong>in1d()<\/strong> <a href=\"https:\/\/numpy.org\/doc\/stable\/reference\/generated\/numpy.in1d.html\" target=\"_blank\" rel=\"noopener\">qui<\/a> .<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Risorse addizionali<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">I seguenti tutorial spiegano come eseguire altre operazioni di filtraggio comuni in Python:<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/it\/linee-di-filtro-panda-contenenti-stringa\/\" target=\"_blank\" rel=\"noopener\">Come filtrare le righe Pandas DataFrame che contengono una stringa specifica<\/a><br \/><a href=\"https:\/\/statorials.org\/it\/i-panda-filtrano-piu-condizioni\/\" target=\"_blank\" rel=\"noopener\">Come filtrare un Pandas DataFrame su pi\u00f9 condizioni<\/a><br \/> <a href=\"https:\/\/statorials.org\/it\/panda-assenti\/\" target=\"_blank\" rel=\"noopener\">Come utilizzare il filtro &#8220;NOT IN&#8221; in Pandas DataFrame<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u00c8 possibile utilizzare i seguenti metodi per filtrare i valori di un array NumPy: Metodo 1: filtra i valori in base a una singola condizione #filter for values less than 5 my_array[my_array &lt; 5 ] Metodo 2: filtrare i valori utilizzando la condizione &#8220;OR&#8221;. #filter for values less than 5 or greater than 9 my_array[(my_array [&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 filtrare un array NumPy (4 esempi) - Statorials<\/title>\n<meta name=\"description\" content=\"Questo tutorial spiega come filtrare un array NumPy, 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\/filtro-digitale\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Come filtrare un array NumPy (4 esempi) - Statorials\" \/>\n<meta property=\"og:description\" content=\"Questo tutorial spiega come filtrare un array NumPy, con diversi esempi.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/it\/filtro-digitale\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-18T12:33:46+00:00\" \/>\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\/filtro-digitale\/\",\"url\":\"https:\/\/statorials.org\/it\/filtro-digitale\/\",\"name\":\"Come filtrare un array NumPy (4 esempi) - Statorials\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/it\/#website\"},\"datePublished\":\"2023-07-18T12:33:46+00:00\",\"dateModified\":\"2023-07-18T12:33:46+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/it\/#\/schema\/person\/0896f191fb9fb019f2cd8623112cb3ae\"},\"description\":\"Questo tutorial spiega come filtrare un array NumPy, con diversi esempi.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/it\/filtro-digitale\/#breadcrumb\"},\"inLanguage\":\"it-IT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/it\/filtro-digitale\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/it\/filtro-digitale\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Casa\",\"item\":\"https:\/\/statorials.org\/it\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Come filtrare un array numpy (4 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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