{"height":"190","categories":["R"],"version":"1.0","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fdichika.hateblo.jp%2Fentry%2F20180211%2Fp1\" title=\" as.Date\u3059\u308b\u3068\u304d\u306f\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u3092\u3061\u3083\u3093\u3068\u6307\u5b9a\u3057\u3088\u3046\u554f\u984c - \u76c6\u683d\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","provider_url":"https://hatena.blog","type":"rich","provider_name":"Hatena Blog","author_name":"dichika","published":"2018-02-11 00:00:00","width":"100%","blog_url":"https://dichika.hateblo.jp/","url":"https://dichika.hateblo.jp/entry/20180211/p1","image_url":null,"author_url":"https://blog.hatena.ne.jp/dichika/","title":" as.Date\u3059\u308b\u3068\u304d\u306f\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u3092\u3061\u3083\u3093\u3068\u6307\u5b9a\u3057\u3088\u3046\u554f\u984c","blog_title":"\u76c6\u683d\u65e5\u8a18","description":"POSIXct\u306a\u6642\u523b\u30c7\u30fc\u30bf\u306bas.Date\u3059\u308b\u3068\u30011\u65e5\u524d\u306e\u65e5\u4ed8\u306b\u5909\u308f\u3063\u3066\u3057\u307e\u3046\u3002 > as.POSIXct(\"2001-01-01 00:00:01\") [1] \"2001-01-01 00:00:01 JST\" > as.Date(as.POSIXct(\"2001-01-01 00:00:01\")) [1] \"2000-12-31\" \u3053\u308c\u306f\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u3092\u6307\u5b9a\u3057\u306a\u3044\u3068GMT\u3068\u89e3\u91c8\u3055\u308c\u308b\u305f\u3081\u3067\u3042\u308a\u3001\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u3092\u9069\u5207\u306b\u6307\u5b9a\u3059\u308c\u3070\u554f\u984c\u306a\u3044\u3002 > as.Date(as.POSIXct(\"2001-01-01 00:00:01\"), tz = \"Asia/Tokyo\") [1] \"2001-01-01\u2026"}