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[英]R: Why does strptime always return NA when I try to format a date string?
[英]Why does strptime always return NA?
retest = c("May 31 2014 07:31:46", "May 31 2014 07:32:24", "May 31 2014 07:32:24",
"May 31 2014 07:32:26", "May 31 2014 07:32:33", "May 31 2014 07:32:38",
"May 31 2014 07:32:44", "May 31 2014 07:32:49", "May 31 2014 07:32:52",
"May 31 2014 07:32:53")
a <- strptime(retest, format="%B %d %Y %H:%M:%S")
a
# [1] NA NA NA NA NA NA NA NA NA NA
我想念什么?
您需要更改語言環境:
# backup original locale
bkp <- Sys.getlocale('LC_TIME')
# change locale
Sys.setlocale('LC_TIME','C')
retest = c("May 31 2014 07:31:46", "May 31 2014 07:32:24", "May 31 2014 07:32:24",
"May 31 2014 07:32:26", "May 31 2014 07:32:33", "May 31 2014 07:32:38",
"May 31 2014 07:32:44", "May 31 2014 07:32:49", "May 31 2014 07:32:52",
"May 31 2014 07:32:53")
a <- strptime(retest, format="%B %d %Y %H:%M:%S")
# restore original locale (if you want...)
Sys.setlocale('LC_TIME',bkp)
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