小编kaj*_*ajo的帖子

我在将POSIXct转换为字符并返回到R中的POSIXct时遇到问题.我运行以下代码:

time_seq_01 <- seq(as.POSIXct("2012-10-28 02:00:00"), by = 900, length.out = 10)
time_seq_02 <- as.character(time_seq_01)
time_seq_03 <- as.POSIXct(time_seq_02)

或同等学历:

time_seq_01 <- seq(as.POSIXct("2012-10-28 02:00:00"), by = 900, length.out = 10)
time_seq_02 <- format(time_seq_01,usetz = TRUE)
time_seq_03 <- as.POSIXct(time_seq_02)

这是2012年从中欧夏令时(CEST)到中欧时间(CET)的夏令时转换(10月02:00 - 03:00的最后一个星期日)的时间戳.

当我把这些元素称为时,我得到了

time_seq_01
[1] "2012-10-28 02:00:00 CEST" "2012-10-28 02:15:00 CEST"
[3] "2012-10-28 02:30:00 CEST" "2012-10-28 02:45:00 CEST"
[5] "2012-10-28 02:00:00 CET"  "2012-10-28 02:15:00 CET" 
[7] "2012-10-28 02:30:00 CET"  "2012-10-28 02:45:00 CET" 
[9] "2012-10-28 03:00:00 CET"  "2012-10-28 …