{"id":2189,"date":"2023-07-23T08:12:29","date_gmt":"2023-07-23T08:12:29","guid":{"rendered":"https:\/\/statorials.org\/it\/tabella-numpy-in-csv\/"},"modified":"2023-07-23T08:12:29","modified_gmt":"2023-07-23T08:12:29","slug":"tabella-numpy-in-csv","status":"publish","type":"post","link":"https:\/\/statorials.org\/it\/tabella-numpy-in-csv\/","title":{"rendered":"Come esportare un array numpy in un file csv (con esempi)"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">\u00c8 possibile utilizzare la seguente sintassi di base per esportare un array NumPy in un file CSV:<\/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;\">#define NumPy array\n<\/span>data = np. <span style=\"color: #3366ff;\">array<\/span> ([[1,2,3],[4,5,6],[7,8,9]])\n\n<span style=\"color: #008080;\">#export array to CSV file\n<\/span>n.p. <span style=\"color: #3366ff;\">savetxt<\/span> (\" <span style=\"color: #ff0000;\">my_data.csv<\/span> \", data, delimiter=\" <span style=\"color: #ff0000;\">,<\/span> \")\n<\/strong><\/span><\/pre>\n<p> <span style=\"color: #000000;\">Gli esempi seguenti mostrano come utilizzare questa sintassi nella pratica.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Esempio 1: esporta un array NumPy in formato CSV<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Il codice seguente mostra come esportare un array NumPy in un file CSV:<\/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;\">#define NumPy array\n<\/span>data = np. <span style=\"color: #3366ff;\">array<\/span> ([[1,2,3], [4,5,6], [7,8,9], [10, 11, 12], [13, 14, 15]])\n\n<span style=\"color: #008080;\">#export array to CSV file\n<\/span>n.p. <span style=\"color: #3366ff;\">savetxt<\/span> (\" <span style=\"color: #ff0000;\">my_data.csv<\/span> \", data, delimiter=\" <span style=\"color: #ff0000;\">,<\/span> \")<\/strong><\/span><\/pre>\n<p> <span style=\"color: #000000;\">Se vado alla posizione in cui \u00e8 salvato il file CSV sul mio laptop, posso visualizzare i dati:<\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-20178 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/exporternumpy1.png\" alt=\"\" width=\"643\" height=\"145\" srcset=\"\" sizes=\"\"><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Esempio 2: esporta un array NumPy in CSV con un formato specifico<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Il formato predefinito per i numeri \u00e8 \u201c%.18e\u201d: visualizza 18 zeri. Tuttavia, possiamo usare l&#8217;argomento <strong>fmt<\/strong> per specificare un formato diverso.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Ad esempio, il codice seguente esporta un array NumPy in formato CSV e specifica due cifre decimali:<\/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;\">#define NumPy array\n<\/span>data = np. <span style=\"color: #3366ff;\">array<\/span> ([[1,2,3], [4,5,6], [7,8,9], [10, 11, 12], [13, 14, 15]])\n\n<span style=\"color: #008080;\">#export array to CSV file (using 2 decimal places)\n<\/span>n.p. <span style=\"color: #3366ff;\">savetxt<\/span> (\" <span style=\"color: #ff0000;\">my_data.csv<\/span> \", data, delimiter=\" <span style=\"color: #ff0000;\">,<\/span> \", fmt=\" <span style=\"color: #ff0000;\">%.2f<\/span> \")<\/strong><\/span><\/pre>\n<p> <span style=\"color: #000000;\">Se vado dove \u00e8 salvato il file CSV, posso visualizzare i dati:<\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-20179 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/exporternumpy2.png\" alt=\"\" width=\"523\" height=\"145\" srcset=\"\" sizes=\"\"><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Esempio 3: esporta un array NumPy in CSV con intestazioni<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Il codice seguente mostra come esportare un array NumPy in un file CSV con intestazioni di colonna personalizzate:<\/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;\">#define NumPy array\n<\/span>data = np. <span style=\"color: #3366ff;\">array<\/span> ([[1,2,3], [4,5,6], [7,8,9], [10, 11, 12], [13, 14, 15]])\n\n<span style=\"color: #008080;\">#export array to CSV file (using 2 decimal places)\n<\/span>n.p. <span style=\"color: #3366ff;\">savetxt<\/span> (\" <span style=\"color: #ff0000;\">my_data.csv<\/span> \", data, delimiter=\" <span style=\"color: #ff0000;\">,<\/span> \", fmt=\" <span style=\"color: #ff0000;\">%.2f<\/span> \",\n           header=\" <span style=\"color: #ff0000;\">A, B, C<\/span> \", comments=\"\")<\/strong><\/span><\/pre>\n<p> <span style=\"color: #000000;\"><strong>Nota<\/strong> : l&#8217;argomento <strong>commenti<\/strong> impedisce la visualizzazione del simbolo &#8220;#&#8221; nelle intestazioni.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Se vado dove \u00e8 salvato il file CSV, posso visualizzare i dati:<\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-20180 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/exporternumpy.png\" alt=\"\" width=\"547\" height=\"179\" srcset=\"\" sizes=\"\"><\/p>\n<p> <span style=\"color: #000000;\"><strong>Nota<\/strong> : puoi trovare la documentazione completa per la funzione <strong>numpy.savetxt()<\/strong> <a href=\"https:\/\/numpy.org\/doc\/stable\/reference\/generated\/numpy.savetxt.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 comuni di lettura e scrittura in Python:<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/it\/numpy-leggi-csv\/\" target=\"_blank\" rel=\"noopener\">Come leggere file CSV con NumPy<\/a><br \/> <a href=\"https:\/\/statorials.org\/it\/i-panda-leggono-csv\/\" target=\"_blank\" rel=\"noopener\">Come leggere file CSV con Pandas<\/a><br \/> <a href=\"https:\/\/statorials.org\/it\/panda-in-csv\/\" target=\"_blank\" rel=\"noopener\">Come esportare Pandas DataFrame in un file CSV<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u00c8 possibile utilizzare la seguente sintassi di base per esportare un array NumPy in un file CSV: import numpy as np #define NumPy array data = np. array ([[1,2,3],[4,5,6],[7,8,9]]) #export array to CSV file n.p. savetxt (&#8221; my_data.csv &#8220;, data, delimiter=&#8221; , &#8220;) Gli esempi seguenti mostrano come utilizzare questa sintassi nella pratica. Esempio 1: [&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 esportare un array NumPy in un file CSV (con esempi) - Statorials<\/title>\n<meta name=\"description\" content=\"Questo tutorial spiega come esportare un array NumPy in un file CSV, 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\/tabella-numpy-in-csv\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Come esportare un array NumPy in un file CSV (con esempi) - Statorials\" \/>\n<meta property=\"og:description\" content=\"Questo tutorial spiega come esportare un array NumPy in un file CSV, con diversi esempi.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/it\/tabella-numpy-in-csv\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-23T08:12:29+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/exporternumpy1.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\/tabella-numpy-in-csv\/\",\"url\":\"https:\/\/statorials.org\/it\/tabella-numpy-in-csv\/\",\"name\":\"Come esportare un array NumPy in un file CSV (con esempi) - Statorials\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/it\/#website\"},\"datePublished\":\"2023-07-23T08:12:29+00:00\",\"dateModified\":\"2023-07-23T08:12:29+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/it\/#\/schema\/person\/0896f191fb9fb019f2cd8623112cb3ae\"},\"description\":\"Questo tutorial spiega come esportare un array NumPy in un file CSV, con diversi esempi.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/it\/tabella-numpy-in-csv\/#breadcrumb\"},\"inLanguage\":\"it-IT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/it\/tabella-numpy-in-csv\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/it\/tabella-numpy-in-csv\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Casa\",\"item\":\"https:\/\/statorials.org\/it\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Come esportare un array numpy in un file csv (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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