Question

运行这些时出错：

library(lubridate)
dmy_hm("3/10/2010 2:00",tz="Australia/Melbourne")
dmy_hm("2/10/2011 2:00",tz="Australia/Melbourne")

只是我吗？

Answer 1

问题是夏令时，从这些时间点开始。此时区不存在2010年3月10日2:00到3/10/2010 2:59之间的任何内容。

library(lubridate)
dmy_hm("3/10/2010 1:59",tz="Australia/Melbourne")
#[1] "2010-10-03 01:59:00 EST"
dmy_hm("3/10/2010 2:00",tz="Australia/Melbourne")
#Error: evaluation nested too deeply: infinite recursion / options(expressions=)?
#Error during wrapup: evaluation nested too deeply: infinite recursion / options(expressions=)?
dmy_hm("3/10/2010 2:01",tz="Australia/Melbourne")
#Error: evaluation nested too deeply: infinite recursion / options(expressions=)?
#Error during wrapup: evaluation nested too deeply: infinite recursion / options(expressions=)?
dmy_hm("3/10/2010 2:59",tz="Australia/Melbourne")
#Error: evaluation nested too deeply: infinite recursion / options(expressions=)?
#Error during wrapup: evaluation nested too deeply: infinite recursion / options(expressions=)?
dmy_hm("3/10/2010 3:00",tz="Australia/Melbourne")
#[1] "2010-10-03 03:00:00 EST"

但是，lubridate应该优雅地处理这个问题，例如，返回NA。

Answer 2

我收到错误

Error: evaluation nested too deeply: infinite recursion / options(expressions=)?

使用traceback()，发生错误时的调用堆栈如下所示

...
10: .local_parse(x[new_na])
9: .local_parse(x[new_na])
8: .local_parse(x[new_na])
7: .local_parse(x[new_na])
6: .local_parse(x[new_na])
5: .local_parse(x[to_parse], TRUE)
4: parse_date_time(dates, orders, tz = tz, locale = locale, quiet = quiet)
3: as.POSIXct(parse_date_time(dates, orders, tz = tz, locale = locale, 
     ...
2: .parse_xxx_hms(..., orders = "dmyR", quiet = quiet, tz = tz, 
     ...
1: dmy_hm("2/10/2011 2:00", tz = "Australia/Melbourne")

所以这是.local_parse中的一个错误，它在parse_date_time中定义。您可以在此处提交错误报告：

https://github.com/hadley/lubridate/issues

什么是错的dmy_hm（“3/10/2010 2:00”，tz =“澳大利亚/墨尔本”）？

2 个答案: