{"id":3017,"date":"2023-07-19T14:38:06","date_gmt":"2023-07-19T14:38:06","guid":{"rendered":"https:\/\/statorials.org\/ja\/r-%e3%81%ae%e6%97%a5%e4%bb%98%e9%96%a2%e6%95%b0%e3%81%a8%e3%81%97%e3%81%a6\/"},"modified":"2023-07-19T14:38:06","modified_gmt":"2023-07-19T14:38:06","slug":"r-%e3%81%ae%e6%97%a5%e4%bb%98%e9%96%a2%e6%95%b0%e3%81%a8%e3%81%97%e3%81%a6","status":"publish","type":"post","link":"https:\/\/statorials.org\/ja\/r-%e3%81%ae%e6%97%a5%e4%bb%98%e9%96%a2%e6%95%b0%e3%81%a8%e3%81%97%e3%81%a6\/","title":{"rendered":"R \u3067 as.date() \u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5 (\u4f8b\u4ed8\u304d)"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">R \u3067<b>as.Date()<\/b>\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u6587\u5b57\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u65e5\u4ed8\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u3059\u3070\u3084\u304f\u5909\u63db\u3067\u304d\u307e\u3059\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u3053\u306e\u95a2\u6570\u306f\u6b21\u306e\u57fa\u672c\u69cb\u6587\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>as. <span style=\"color: #3366ff;\">Date<\/span> (x, format, tryFormats = c(\" <span style=\"color: #ff0000;\">%Y-%m-%d<\/span> \", \" <span style=\"color: #ff0000;\">%Y\/%m\/%d<\/span> \")\n<\/strong><\/pre>\n<p><span style=\"color: #000000;\">\u91d1\uff1a<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>x<\/strong> : \u65e5\u4ed8\u306b\u5909\u63db\u3059\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u540d\u524d\u3002<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>format<\/strong> : \u65e5\u4ed8\u6587\u5b57\u5217\u306e\u5f62\u5f0f\u3002\u6307\u5b9a\u3057\u306a\u3044\u5834\u5408\u306f\u3001tryFormat \u306e\u3044\u305a\u308c\u304b\u3092\u8a66\u3057\u307e\u3059\u3002<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>tryFormats<\/strong> : \u8a66\u884c\u3059\u308b\u5f62\u5f0f\u3002<\/span><\/li>\n<\/ul>\n<p><span style=\"color: #000000;\">\u6b21\u306e\u4f8b\u306f\u3001\u3055\u307e\u3056\u307e\u306a\u30b7\u30ca\u30ea\u30aa\u3067\u3053\u306e\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/span><\/p>\n<h3><span style=\"color: #000000;\"><strong>\u4f8b 1: \u8a8d\u8b58\u53ef\u80fd\u306a\u65e5\u4ed8\u5f62\u5f0f\u3067\u306e as.Date() \u306e\u4f7f\u7528<\/strong><\/span><\/h3>\n<p><span style=\"color: #000000;\">\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306f\u3001\u6587\u5b57\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u6b21\u306e\u3044\u305a\u308c\u304b\u306e\u65b9\u6cd5\u3067\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u3001 <strong>as.Date()<\/strong>\u95a2\u6570\u306f\u6587\u5b57\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u65e5\u4ed8\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u7c21\u5358\u306b\u5909\u63db\u3067\u304d\u307e\u3059\u3002<\/span><\/p>\n<ul>\n<li> <strong><span style=\"color: #000000;\">%Y-%m-%d<\/span><\/strong><\/li>\n<li> <span style=\"color: #000000;\"><strong>%A\/%m\/%d<\/strong><\/span><\/li>\n<\/ul>\n<p><span style=\"color: #000000;\">\u6b21\u306e\u30b3\u30fc\u30c9\u306f\u3001 <strong>as.Date()<\/strong>\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066<strong>\u3001%Y-%m-%d<\/strong>\u5f62\u5f0f\u306e\u6587\u5b57\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u65e5\u4ed8\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5909\u63db\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #008080;\">#define character object in %Y-%m-%d format<\/span>\nx &lt;- \"2022-10-15\"\n\n<span style=\"color: #008080;\">#view class of x\n<\/span>class(x)\n\n[1] \u201ccharacter\u201d\n\n<span style=\"color: #008080;\">#convert character object to date object\n<\/span>my_date &lt;- as. <span style=\"color: #3366ff;\">Date<\/span> (s)\n\n<span style=\"color: #008080;\">#view new date object\n<\/span>my_date\n\n[1] \"2022-10-15\"\n\n<span style=\"color: #008080;\">#view class of my_date\n<\/span>class(my_date)\n\n[1] \u201cDate\u201d\n<\/span><\/span><\/strong><\/pre>\n<p><span style=\"color: #000000;\">\u6587\u5b57\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u65e5\u4ed8\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5909\u63db\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u6b21\u306e\u30b3\u30fc\u30c9\u306f\u3001 <strong>as.Date()<\/strong>\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066<strong>\u3001%Y\/%m\/%d<\/strong>\u5f62\u5f0f\u306e\u6587\u5b57\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u65e5\u4ed8\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5909\u63db\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #008080;\">#define character object in %Y\/%m\/%d format\n<\/span>x &lt;- \"2022\/10\/15\"\n\n<span style=\"color: #008080;\">#convert character object to date object\n<\/span>my_date &lt;- as. <span style=\"color: #3366ff;\">Date<\/span> (s)\n\n<span style=\"color: #008080;\">#view class of my_date\n<\/span>class(my_date)\n\n[1] \u201cDate\u201d\n<\/span><\/span><\/strong><\/pre>\n<p><span style=\"color: #000000;\">\u6587\u5b57\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u65e5\u4ed8\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5909\u63db\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u3053\u308c\u3089 2 \u3064\u306e\u4f8b\u3067\u306f\u3001\u4e21\u65b9\u306e\u65e5\u4ed8\u5f62\u5f0f\u304c R \u306b\u3088\u3063\u3066\u8a8d\u8b58\u3055\u308c\u305f\u305f\u3081\u3001 <strong>as.Date()<\/strong>\u95a2\u6570\u3067<strong>format<\/strong>\u5f15\u6570\u3092\u4f7f\u7528\u3059\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u3067\u3057\u305f\u3002<\/span><\/p>\n<h3><span style=\"color: #000000;\"><strong>\u4f8b 2: \u8a8d\u8b58\u3067\u304d\u306a\u3044\u65e5\u4ed8\u5f62\u5f0f\u3067\u306e as.Date() \u306e\u4f7f\u7528<\/strong><\/span><\/h3>\n<p><span style=\"color: #000000;\"><span style=\"color: #000000;\">\u6587\u5b57\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u65e5\u4ed8\u5f62\u5f0f\u304c\u8a8d\u8b58\u3067\u304d\u306a\u3044\u5834\u5408\u306f\u3001 <strong>format<\/strong>\u5f15\u6570\u3092\u4f7f\u7528\u3057\u3066\u5f62\u5f0f\u3092\u6307\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/span><\/span><\/p>\n<p><span style=\"color: #000000;\">\u305f\u3068\u3048\u3070\u3001\u6b21\u306e\u30b3\u30fc\u30c9\u306f\u3001 <strong>as.Date()<\/strong>\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066<strong>\u3001%m\/%d\/%Y<\/strong>\u5f62\u5f0f\u306e\u6587\u5b57\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u65e5\u4ed8\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5909\u63db\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #008080;\">#define character object in %m\/%d\/%Y format\n<\/span>x &lt;- \"10\/15\/2022\"\n\n<span style=\"color: #008080;\">#convert character object to date object\n<\/span>my_date &lt;- as. <span style=\"color: #3366ff;\">Date<\/span> (x, format=\" <span style=\"color: #ff0000;\">%m\/%d\/%Y<\/span> \")\n\n<span style=\"color: #008080;\">#view new date object<\/span>\nmy_date\n\n[1] \"2022-10-15\"\n\n<span style=\"color: #008080;\">#view class of my_date\n<\/span>class(my_date)\n\n[1] \u201cDate\u201d\n<\/span><\/span><\/strong><\/pre>\n<p><span style=\"color: #000000;\">\u6587\u5b57\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u65e5\u4ed8\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5909\u63db\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u6b21\u306e\u30b3\u30fc\u30c9\u306f\u3001 <strong>as.Date()<\/strong>\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066<strong>%m%d%Y<\/strong>\u5f62\u5f0f\u306e\u6587\u5b57\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u65e5\u4ed8\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5909\u63db\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #008080;\">#define character object in %m%d%Y format\n<\/span>x &lt;- \"10152022\"\n\n<span style=\"color: #008080;\">#convert character object to date object\n<\/span>my_date &lt;- as. <span style=\"color: #3366ff;\">Date<\/span> (x, format=\" <span style=\"color: #ff0000;\">%m%d%Y<\/span> \")\n\n<span style=\"color: #008080;\">#view new date object<\/span>\nmy_date\n\n[1] \"2022-10-15\"\n\n<span style=\"color: #008080;\">#view class of my_date\n<\/span>class(my_date)\n\n[1] \u201cDate\u201d\n<\/span><\/span><\/strong><\/pre>\n<p><span style=\"color: #000000;\">\u6587\u5b57\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u65e5\u4ed8\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u6b63\u5e38\u306b\u5909\u63db\u3055\u308c\u307e\u3057\u305f\u3002<\/span><\/p>\n<h3><span style=\"color: #000000;\"><strong>\u8ffd\u52a0\u30ea\u30bd\u30fc\u30b9<\/strong><\/span><\/h3>\n<p><span style=\"color: #000000;\">\u6b21\u306e\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3067\u306f\u3001R \u3067\u4ed6\u306e\u4e00\u822c\u7684\u306a\u64cd\u4f5c\u3092\u5b9f\u884c\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/ja\/r-\u306e\u65e5\u4ed8\u307e\u3066\u3099\u306e\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d5\u309a\/\" target=\"_blank\" rel=\"noopener\">UNIX \u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u3092 R \u306e\u65e5\u4ed8\u306b\u5909\u63db\u3059\u308b\u65b9\u6cd5<\/a><br \/><a href=\"https:\/\/statorials.org\/ja\/\u65e5\u4ed8\u8981\u7d20\u3092-r-\u306b\u5909\u63db\u3059\u308b\/\" target=\"_blank\" rel=\"noopener\">R\u3067\u56e0\u5b50\u3092\u65e5\u4ed8\u306b\u5909\u63db\u3059\u308b\u65b9\u6cd5<\/a><br \/><a href=\"https:\/\/statorials.org\/ja\/r-\u3066\u3099\u65e5\u4ed8\u9806\u306b\u4e26\u3078\u3099\u66ff\u3048\u308b\/\" target=\"_blank\" rel=\"noopener\">R \u3067\u30c7\u30fc\u30bf\u30d5\u30ec\u30fc\u30e0\u3092\u65e5\u4ed8\u3067\u4e26\u3079\u66ff\u3048\u308b\u65b9\u6cd5<\/a><br \/><a href=\"https:\/\/statorials.org\/ja\/r\u306e\u65e5\u4ed8\u304b\u3089\u5e74\u3092\u62bd\u51fa\u3059\u308b\/\" target=\"_blank\" rel=\"noopener\">R\u3067\u65e5\u4ed8\u304b\u3089\u5e74\u3092\u62bd\u51fa\u3059\u308b\u65b9\u6cd5<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>R \u3067as.Date()\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u6587\u5b57\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u65e5\u4ed8\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u3059\u3070\u3084\u304f\u5909\u63db\u3067\u304d\u307e\u3059\u3002 \u3053\u306e\u95a2\u6570\u306f\u6b21\u306e\u57fa\u672c\u69cb\u6587\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002 as. Date (x, format, tryFormats = c(&#8221; %Y [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-3017","post","type-post","status-publish","format-standard","hentry","category-16"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>R \u3067 as.Date() \u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5 (\u4f8b\u4ed8\u304d) \u2013 \u8a18\u4e8b<\/title>\n<meta name=\"description\" content=\"\u3053\u306e\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3067\u306f\u3001R \u3067 as.Date() \u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5\u3092\u3044\u304f\u3064\u304b\u306e\u4f8b\u3068\u3068\u3082\u306b\u8aac\u660e\u3057\u307e\u3059\u3002\" \/>\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\/ja\/r-\u306e\u65e5\u4ed8\u95a2\u6570\u3068\u3057\u3066\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"R \u3067 as.Date() \u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5 (\u4f8b\u4ed8\u304d) \u2013 \u8a18\u4e8b\" \/>\n<meta property=\"og:description\" content=\"\u3053\u306e\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3067\u306f\u3001R \u3067 as.Date() \u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5\u3092\u3044\u304f\u3064\u304b\u306e\u4f8b\u3068\u3068\u3082\u306b\u8aac\u660e\u3057\u307e\u3059\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/ja\/r-\u306e\u65e5\u4ed8\u95a2\u6570\u3068\u3057\u3066\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-19T14:38:06+00:00\" \/>\n<meta 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