{"id":3095,"date":"2023-07-19T05:30:35","date_gmt":"2023-07-19T05:30:35","guid":{"rendered":"https:\/\/statorials.org\/ja\/r-%e3%82%a8%e3%83%a9%e3%83%bc%e3%81%ae%e7%99%ba%e7%94%9f%e6%97%a5%e3%82%92%e6%8c%87%e5%ae%9a%e3%81%99%e3%82%8b%e5%bf%85%e8%a6%81%e3%81%8b%e3%82%99%e3%81%82%e3%82%8a%e3%81%be%e3%81%99\/"},"modified":"2023-07-19T05:30:35","modified_gmt":"2023-07-19T05:30:35","slug":"r-%e3%82%a8%e3%83%a9%e3%83%bc%e3%81%ae%e7%99%ba%e7%94%9f%e6%97%a5%e3%82%92%e6%8c%87%e5%ae%9a%e3%81%99%e3%82%8b%e5%bf%85%e8%a6%81%e3%81%8b%e3%82%99%e3%81%82%e3%82%8a%e3%81%be%e3%81%99","status":"publish","type":"post","link":"https:\/\/statorials.org\/ja\/r-%e3%82%a8%e3%83%a9%e3%83%bc%e3%81%ae%e7%99%ba%e7%94%9f%e6%97%a5%e3%82%92%e6%8c%87%e5%ae%9a%e3%81%99%e3%82%8b%e5%bf%85%e8%a6%81%e3%81%8b%e3%82%99%e3%81%82%e3%82%8a%e3%81%be%e3%81%99\/","title":{"rendered":"R \u3067\u306e\u4fee\u6b63\u65b9\u6cd5: as.date.numeric(x) \u306e\u30a8\u30e9\u30fc: 'origin' \u3092\u6307\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059"},"content":{"rendered":"

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R \u3067\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u306e\u3042\u308b\u30a8\u30e9\u30fc\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/span><\/p>\n

 Error in as.Date.numeric(x) : 'origin' must be supplied \n<\/strong><\/pre>\n
\u3053\u306e\u30a8\u30e9\u30fc\u306f\u901a\u5e38\u3001R \u3067\u6570\u5024\u3092\u65e5\u4ed8\u306b\u5909\u63db\u3057\u3088\u3046\u3068\u3057\u305f\u304c\u3001\u5143\u306e\u65e5\u4ed8\u3092\u63d0\u4f9b\u3067\u304d\u306a\u3044\u5834\u5408\u306b\u767a\u751f\u3057\u307e\u3059\u3002<\/span><\/p>\n
\u3053\u306e\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3067\u306f\u3001\u3053\u306e\u30a8\u30e9\u30fc\u3092\u4fee\u6b63\u3059\u308b\u65b9\u6cd5\u3092\u6b63\u78ba\u306b\u8aac\u660e\u3057\u307e\u3059\u3002<\/span><\/p>\n
\u30a8\u30e9\u30fc\u3092\u518d\u73fe\u3059\u308b\u65b9\u6cd5<\/strong><\/h3>\n
R \u306b\u3001\u4f01\u696d\u306b\u3088\u308b\u6570\u65e5\u9593\u306e\u7dcf\u58f2\u4e0a\u9ad8\u3092\u793a\u3059\u6b21\u306e\u30c7\u30fc\u30bf \u30d5\u30ec\u30fc\u30e0\u304c\u3042\u308b\u3068\u3057\u307e\u3059\u3002<\/span><\/p>\n
 #create data frame\ndf <- data. frame<\/span> (date=c(27, 140, 180, 200),\n                 sales=c(12, 22, 30, 31))<\/span>\n\n#view data frame\ndf\n\n  dirty dates\n1 27 12\n2 140 22\n3 180 30\n4,200 31<\/span><\/span><\/strong><\/span><\/pre>\n
 str()<\/a>\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u3001\u30c7\u30fc\u30bf \u30d5\u30ec\u30fc\u30e0\u306e\u69cb\u9020\u3092\u8868\u793a\u3067\u304d\u307e\u3059\u3002<\/span><\/p>\n
 #view structure of data frame<\/strong><\/span>\nstr(df)\n\n'data.frame': 4 obs. of 2 variables:\n $ date: num 27 140 180 200\n $ sales: num 12 22 30 31\n<\/strong><\/pre>\n
\u65e5\u4ed8\u5217<\/strong>\u3068\u58f2\u4e0a<\/strong>\u9ad8\u5217\u304c\u4e21\u65b9\u3068\u3082\u6570\u5024\u3067\u3042\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/span><\/p>\n
\u3053\u3053\u3067\u3001\u65e5\u4ed8<\/strong>\u5217\u3092\u65e5\u4ed8\u5f62\u5f0f\u306b\u5909\u63db\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u3057\u307e\u3059\u3002<\/span><\/p>\n
 #attempt to convert date column to date format<\/strong><\/span>\ndf$date <- as. Date<\/span> (df$date)\n\nError in as.Date.numeric(df$date) : 'origin' must be supplied\n<\/strong><\/span><\/pre>\n
 as.Date()<\/strong>\u95a2\u6570\u3067origin<\/strong>\u5f15\u6570\u3092\u4f7f\u7528\u3057\u306a\u304b\u3063\u305f\u305f\u3081\u3001\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3059\u3002<\/span><\/p>\n
\u30a8\u30e9\u30fc\u3092\u4fee\u6b63\u3059\u308b\u65b9\u6cd5<\/strong><\/span><\/h3>\n
\u3053\u306e\u30a8\u30e9\u30fc\u3092\u4fee\u6b63\u3059\u308b\u65b9\u6cd5\u306f\u3001\u5358\u7d14\u306b\u5143\u306e\u65e5\u4ed8\u3092\u6307\u5b9a\u3057\u3066\u3001R \u304c\u6570\u5024\u3092\u65e5\u4ed8\u306b\u5909\u63db\u3059\u308b\u65b9\u6cd5\u3092\u8a8d\u8b58\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b\u3053\u3068\u3067\u3059\u3002<\/span><\/p>\n
 #convert date column to date format, using 2020-01-01 as origin date\ndf$date <- as. Date<\/span> (df$date, origin=\" 2020-01-01<\/span> \")\n\n#view updated data frame\n<\/span>df\n\n        dirty dates\n1 2020-01-28 12\n2 2020-05-20 22\n3 2020-06-29 30\n4 2020-07-19 31<\/span><\/span><\/strong><\/span><\/pre>\n
\u8d77\u70b9\u306e\u65e5\u4ed8\u3092\u6307\u5b9a\u3059\u308b\u3068\u3001R \u306f\u3001\u6307\u5b9a\u3055\u308c\u305f\u8d77\u70b9\u306b\u65e5\u6570\u3092\u52a0\u7b97\u3057\u3066\u6570\u5024\u3092\u65e5\u4ed8\u306b\u5909\u63db\u3057\u307e\u3057\u305f\u3002<\/span><\/p>\n
\u4f8b\u3048\u3070\uff1a<\/span><\/p>\n