截断动物园时间序列到最近的10分钟

时间:2012-01-17 12:07:30

标签: r time-series zoo

我有一个动物园时间序列如下:

>> head(ww)
(11/22/08 11:37:00) (11/22/08 12:07:00) (11/22/08 12:22:00) (11/22/08 12:37:00) 
           0.087114            0.055422            0.055250            0.059483 
(11/22/08 12:52:00) (11/22/08 13:07:00) 
           0.057896            0.061808

如您所见,时间是11:37,12:07,12:22等。我想将这些时间更改为最接近的十分钟的整数倍 - 例如XX:10,XX:20。在这种情况下,11:37将成为11:40,12:07将成为12:10,12:22将成为12:20。

我找到了如何将它聚合到最近的分钟:

wholemin <- function(x) trunc(x, units="minutes")
result = aggregate(r, wholemin, head, 1)

但我无法使用trunc聚合到秒,分钟,小时等以外的任何其他内容。

我该怎么做呢?

为了便于举例,dput(head(ww)的输出如下:

structure(c(0.087114, 0.055422, 0.05525, 0.059483, 0.057896, 
0.061808), index = structure(c(14205.4840277778, 14205.5048611111, 
14205.5152777778, 14205.5256944444, 14205.5361111111, 14205.5465277778
), format = structure(c("m/d/y", "h:m:s"), .Names = c("dates", 
"times")), origin = structure(c(1, 1, 1970), .Names = c("month", 
"day", "year")), class = c("chron", "dates", "times")), class = "zoo")

1 个答案:

答案 0 :(得分:4)

试试这个:

to10 <- function(tt) trunc(tt + as.numeric(times("00:05:00")), units = "00:10:00")
aggregate(z, to10, mean)

并查看?trunc.times?aggregate.zoo中的示例。