{"id":3643,"date":"2023-07-16T09:20:25","date_gmt":"2023-07-16T09:20:25","guid":{"rendered":"https:\/\/statorials.org\/it\/media-mobile-sas\/"},"modified":"2023-07-16T09:20:25","modified_gmt":"2023-07-16T09:20:25","slug":"media-mobile-sas","status":"publish","type":"post","link":"https:\/\/statorials.org\/it\/media-mobile-sas\/","title":{"rendered":"Come calcolare una media mobile in sas"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Nelle statistiche, una <strong>media mobile<\/strong> rappresenta la media dei precedenti <em>n<\/em> valori in un set di dati.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><span style=\"color: #000000;\">Il modo pi\u00f9 semplice per calcolare una media mobile in SAS \u00e8 utilizzare l&#8217;istruzione <strong>proc espanso<\/strong> .<\/span><\/span><\/p>\n<p> <span style=\"color: #000000;\">L&#8217;esempio seguente mostra come utilizzare questa affermazione nella pratica.<\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>Esempio: calcolare una media mobile in SAS<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Supponiamo di creare il seguente set di dati in SAS:<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\">\/*create dataset*\/\n<\/span><span style=\"color: #800080;\"><span style=\"color: #000000;\"><span style=\"color: #800080;\">data<\/span> original_data;\n    <span style=\"color: #3366ff;\">input<\/span> time values;\n    <span style=\"color: #3366ff;\">datalines<\/span> ;\n1 7\n2 12\n3 14\n4 12\n5 16\n6 18\n7 11\n8 10\n9 14\n10 17\n;\n<span style=\"color: #800080;\">run<\/span> ;<\/span>\n\n<span style=\"color: #008000;\">\/*view dataset*\/\n<\/span><span style=\"color: #800080;\">proc print<\/span> <span style=\"color: #3366ff;\">data<\/span> <span style=\"color: #000000;\">= original_data;\n<\/span><\/span><\/strong><\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-29901 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/masa1.jpg\" alt=\"\" width=\"163\" height=\"298\" srcset=\"\" sizes=\"\"><\/p>\n<p> <span style=\"color: #000000;\">Supponiamo ora di voler calcolare una media mobile a 3 periodi per la colonna <strong>dei valori<\/strong> .<\/span><\/p>\n<p> <span style=\"color: #000000;\">Possiamo usare <strong>procexpand<\/strong> per fare questo:<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong><span style=\"color: #008000;\">\/*calculate 3-period moving average for values*\/\n<span style=\"color: #000000;\"><span style=\"color: #800080;\">proc expand<\/span> <span style=\"color: #3366ff;\">data<\/span> =original_data <span style=\"color: #3366ff;\">out<\/span> =out_data method=none;\n    <span style=\"color: #3366ff;\">idtime<\/span> ;\n    <span style=\"color: #3366ff;\">convert<\/span> values = values_ma3 \/ <span style=\"color: #3366ff;\">transout<\/span> = (movave <span style=\"color: #008000;\">3<\/span> );\n<span style=\"color: #800080;\">run<\/span> ;\n\n<span style=\"color: #008000;\">\/*view results*\/\n<\/span><span style=\"color: #800080;\">proc print<\/span> <span style=\"color: #3366ff;\">data<\/span> =out_data;<\/span><\/span><\/strong><\/span> <\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-29902 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/masa2.jpg\" alt=\"\" width=\"256\" height=\"295\" srcset=\"\" sizes=\"\"><\/p>\n<p> <span style=\"color: #000000;\">La nuova colonna denominata <strong>my3_values<\/strong> mostra la media mobile di 3 periodi per la colonna <strong>dei valori<\/strong> .<\/span><\/p>\n<p> <span style=\"color: #000000;\">Ad esempio, il terzo valore della <strong>colonnavalues_my3<\/strong> rappresenta la media dei 3 periodi precedenti:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">Media mobile = (7+12+14) \/ 3 = <strong>11,0000<\/strong><\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">Il quarto valore della colonna <strong>valori_ma3<\/strong> rappresenta anche la media dei 3 periodi precedenti:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">Media mobile = (12+14+12) \/ 3 = <strong>12,6667<\/strong><\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">E cos\u00ec via.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Per calcolare la media mobile per un numero diverso di periodi, \u00e8 sufficiente modificare il valore dopo <strong>aver spostato<\/strong> il codice.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Ad esempio, potremmo utilizzare il seguente codice per calcolare una media mobile di 4 periodi per la colonna <strong>dei valori<\/strong> :<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong><span style=\"color: #008000;\">\/*calculate 4-period moving average for values*\/\n<span style=\"color: #000000;\"><span style=\"color: #800080;\">proc expand<\/span> <span style=\"color: #3366ff;\">data<\/span> =original_data <span style=\"color: #3366ff;\">out<\/span> =out_data method=none;\n    <span style=\"color: #3366ff;\">idtime<\/span> ;\n    <span style=\"color: #3366ff;\">convert<\/span> values = values_ma4 \/ <span style=\"color: #3366ff;\">transout<\/span> = (movave <span style=\"color: #008000;\">4<\/span> );\n<span style=\"color: #800080;\">run<\/span> ;\n\n<span style=\"color: #800080;\"><span style=\"color: #008000;\">\/*view results*\/\n<\/span>proc print<\/span> <span style=\"color: #3366ff;\">data<\/span> =out_data;<\/span><\/span><\/strong><\/span> <\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-29903 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/masa3.jpg\" alt=\"\" width=\"264\" height=\"310\" srcset=\"\" sizes=\"\"><\/p>\n<p> <span style=\"color: #000000;\">La nuova colonna denominata <strong>value_my4<\/strong> mostra la media mobile di 4 periodi per la colonna <strong>dei valori<\/strong> .<\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>Risorse addizionali<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">I seguenti articoli spiegano come eseguire altre attivit\u00e0 comuni in SAS:<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/it\/sas-valori-anomali\/\" target=\"_blank\" rel=\"noopener\">Come identificare i valori anomali in SAS<\/a><br \/> <a href=\"https:\/\/statorials.org\/it\/sas-percentili\/\" target=\"_blank\" rel=\"noopener\">Come calcolare i percentili in SAS<\/a><br \/> <a href=\"https:\/\/statorials.org\/it\/modalita-mediana-media-nella-camera-di-equilibrio\/\" target=\"_blank\" rel=\"noopener\">Come calcolare media, mediana e moda in SAS<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Nelle statistiche, una media mobile rappresenta la media dei precedenti n valori in un set di dati. Il modo pi\u00f9 semplice per calcolare una media mobile in SAS \u00e8 utilizzare l&#8217;istruzione proc espanso . L&#8217;esempio seguente mostra come utilizzare questa affermazione nella pratica. Esempio: calcolare una media mobile in SAS Supponiamo di creare il seguente [&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 calcolare una media mobile in SAS - Stology<\/title>\n<meta name=\"description\" content=\"Questo tutorial spiega come calcolare una media mobile in SAS, con un esempio.\" \/>\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\/media-mobile-sas\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Come calcolare una media mobile in SAS - Stology\" \/>\n<meta property=\"og:description\" content=\"Questo tutorial spiega come calcolare una media mobile in SAS, con un esempio.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/it\/media-mobile-sas\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-16T09:20:25+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/masa1.jpg\" \/>\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\/media-mobile-sas\/\",\"url\":\"https:\/\/statorials.org\/it\/media-mobile-sas\/\",\"name\":\"Come calcolare una media mobile in SAS - Stology\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/it\/#website\"},\"datePublished\":\"2023-07-16T09:20:25+00:00\",\"dateModified\":\"2023-07-16T09:20:25+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/it\/#\/schema\/person\/0896f191fb9fb019f2cd8623112cb3ae\"},\"description\":\"Questo tutorial spiega come calcolare una media mobile in SAS, con un esempio.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/it\/media-mobile-sas\/#breadcrumb\"},\"inLanguage\":\"it-IT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/it\/media-mobile-sas\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/it\/media-mobile-sas\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Casa\",\"item\":\"https:\/\/statorials.org\/it\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Come calcolare una media mobile in sas\"}]},{\"@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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