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ISO 8601のUTCの文字列から指定したタイムゾーンの文字列を得る方法

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次のようなISO 8601の拡張表現のタイプスタンプ文字列がログファイルなどにあったとき、JSTタイムゾーンの時刻に変換するには、parsedateパッケージを使うと便利。

> 拡張表現文字列 = "2013-02-08T09:30:26Z"
> library(parsedate)
> parse_iso_8601(拡張表現文字列)
[1] "2013-02-08 09:30:26 UTC"
> as.POSIXlt(parse_iso_8601(拡張表現文字列), tz = "Japan")
[1] "2013-02-08 18:30:26 JST"
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