r - 不规则时间序列数据 - 我可以让它规则吗？在 r-6ren

r - 不规则时间序列数据 - 我可以让它规则吗？在 r

转载作者：行者123 更新时间：2023-12-04 06:21:55

我的数据被编程为每 5 小时获取一次信息，这意味着每天有多个数据点。问题有时是数据记录器出现故障或电池没电或其他任何原因，并且数据丢失或尝试失败。

我所做的所有分析都是基于这些日期。我需要根据此日期/时间戳对所有内容进行排序和过滤并选择所有内容。截至目前，我正在通过“冗长的”脚本来选择和子集我的数据。另外我有几个数据记录器(个人)所以我也是批处理。例如，我想每天只使用一个数据点进行子集化和使用

    #Subset data by minimum time interval
    SubsetData = T
    MinInterval = 47 #minimum time interval (in hours) between consecutive locations
    ###########
    ##Setting the date and time to be recognized as date time
    loc$DateTime = as.POSIXct(strptime(loc$DT,"%m/%d/%Y %H:%M",tz="UTC"),tz="UTC")
    ### Code to subset data based on minimum time interval between locations
    if (SubsetData ==T){
             row = 0
             EndLoc = 2
             SubData1 = loc[1,]
             IDNames = levels(loc$ID)
    for (n in 1:length(IDNames)){
         IndivData = loc[loc$ID==IDNames[n],]
         row = row+1
         SubData1[row,]=IndivData[1,]
     while (EndLoc<nrow(IndivData) ){
           timediff = difftime(IndivData$DateTime[EndLoc],SubData1$DateTime[row],units = "hours")
   if (timediff>MinInterval){
       row = row+1
       SubData1=rbind(SubData1,IndivData[EndLoc,])
       EndLoc = EndLoc+1
         } else{
               EndLoc = EndLoc+1
              }
         } #end while loop
       } #end loop through individuals
     loc = SubData1
   } #end conditional to subset data
    }
   ### End Code to subset data'

那么，有没有办法让我的数据变成时间序列数据，让操作更容易呢？我看过关于 Zoo package a xts 的讨论 - 但这些似乎要求数据在规则的时间序列中。我什至不得不不使用某些脚本，因为它们要求数据采用 ts 格式，而我不知道如何将我的数据转换为这种漂亮的格式。有没有好的资源可以教自己这个？我什至应该使用 ts 吗？

以下是我的数据示例:

structure(list(ID = structure(c(1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 
1L, 1L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L), .Label = c("c_002", 
"c_402"), class = "factor"), Long = c(-147.635233, -147.635232, 
-147.63632, -147.636136, -147.63628, -147.635743, -147.631785, 
-147.619598, -147.605088, -147.602119, -147.179737, -147.133275, 
-147.106584, -147.033649, -147.016078, -147.031872, -146.940969, 
-146.862538, -146.751214, -146.696238, -146.710799), Latitude = c(67.911827, 
67.911193, 67.911048, 67.911169, 67.911625, 67.911767, 67.919419, 
67.926327, 67.925352, 67.926318, 70.017026, 70.041163, 70.057988, 
70.087812, 70.117134, 70.147184, 70.145115, 70.136103, 70.1276, 
70.103395, 70.079301), DT = structure(c(2L, 3L, 5L, 6L, 8L, 9L, 
10L, 11L, 12L, 14L, 393L, 395L, 396L, 398L, 399L, 401L, 402L, 
404L, 405L, 407L, 409L), .Label = c("05/01/2006 00:00", "05/01/2006 00:01", 
"05/01/2006 05:00", "05/01/2006 05:01", "05/01/2006 10:00", "05/01/2006 15:01", 
"05/01/2006 20:00", "05/01/2006 20:01", "05/02/2006 01:00", "05/02/2006 06:00", 
"05/02/2006 11:00", "05/02/2006 16:01", "05/02/2006 21:00", "05/02/2006 21:01", 
"05/03/2006 02:00", "05/03/2006 02:01", "05/03/2006 07:00", "05/03/2006 07:01", 
"05/03/2006 12:00", "05/03/2006 17:00", "05/03/2006 17:01", "05/03/2006 22:00", 
"05/03/2006 22:01", "05/04/2006 03:00", "05/04/2006 03:01", "05/04/2006 08:00", 
"05/04/2006 08:01", "05/04/2006 13:00", "05/04/2006 18:00", "05/04/2006 23:00", 
"05/04/2006 23:01", "05/05/2006 04:00", "05/05/2006 09:00", "05/05/2006 09:01", 
"05/05/2006 14:00", "05/05/2006 19:00", "05/06/2006 00:00", "05/06/2006 00:01", 
"05/06/2006 05:00", "05/06/2006 05:01", "05/06/2006 10:00", "05/06/2006 10:01", 
"05/06/2006 15:01", "05/06/2006 20:00", "05/06/2006 20:01", "05/07/2006 01:00", 
"05/07/2006 01:01", "05/07/2006 06:00", "05/07/2006 06:01", "05/07/2006 11:00", 
"05/07/2006 16:00", "05/07/2006 16:01", "05/07/2006 21:00", "05/08/2006 02:00", 
"05/08/2006 07:01", "05/08/2006 12:00", "05/08/2006 17:00", "05/08/2006 17:01", 
"05/08/2006 22:00", "05/08/2006 22:01", "05/09/2006 03:00", "05/09/2006 03:01", 
"05/09/2006 08:00", "05/09/2006 08:01", "05/09/2006 13:00", "05/09/2006 13:01", 
"05/09/2006 18:00", "05/09/2006 23:00", "05/09/2006 23:01", "05/10/2006 04:00", 
"05/10/2006 04:01", "05/10/2006 09:00", "05/10/2006 09:01", "05/10/2006 14:00", 
"05/10/2006 14:01", "05/10/2006 19:00", "05/10/2006 19:03", "05/11/2006 00:00", 
"05/11/2006 05:00", "05/11/2006 10:00", "05/11/2006 10:01", "05/11/2006 15:01", 
"05/11/2006 15:02", "05/11/2006 20:00", "05/11/2006 20:01", "05/12/2006 01:00", 
"05/12/2006 01:01", "05/12/2006 06:00", "05/12/2006 11:00", "05/12/2006 16:00", 
"05/12/2006 16:01", "05/12/2006 21:00", "05/12/2006 21:01", "05/13/2006 02:00", 
"05/13/2006 07:00", "05/13/2006 07:01", "05/13/2006 12:00", "05/13/2006 17:00", 
"05/13/2006 22:00", "05/13/2006 22:01", "05/14/2006 03:00", "05/14/2006 08:00", 
"05/14/2006 13:00", "05/14/2006 18:00", "05/14/2006 18:01", "05/14/2006 23:00", 
"05/15/2006 04:00", "05/15/2006 04:01", "05/15/2006 09:00", "05/15/2006 09:03", 
"05/15/2006 14:00", "05/15/2006 19:00", "05/16/2006 00:00", "05/16/2006 05:01", 
"05/16/2006 10:00", "05/16/2006 15:00", "05/16/2006 15:01", "05/16/2006 20:00", 
"05/17/2006 01:01", "05/17/2006 01:02", "05/17/2006 06:01", "05/17/2006 11:00", 
"05/17/2006 11:01", "05/17/2006 16:00", "05/17/2006 21:00", "05/18/2006 02:00", 
"05/18/2006 02:01", "05/18/2006 07:00", "05/18/2006 07:01", "05/18/2006 12:00", 
"05/18/2006 12:01", "05/18/2006 17:00", "05/18/2006 22:00", "05/18/2006 22:01", 
"05/19/2006 03:00", "05/19/2006 08:00", "05/19/2006 13:01", "05/19/2006 18:00", 
"05/19/2006 23:00", "05/19/2006 23:01", "05/20/2006 04:00", "05/20/2006 04:01", 
"05/20/2006 09:00", "05/20/2006 09:01", "05/20/2006 14:00", "05/20/2006 14:01", 
"05/20/2006 19:00", "05/21/2006 00:01", "05/21/2006 00:02", "05/21/2006 05:00", 
"05/21/2006 10:00", "05/21/2006 15:00", "05/21/2006 15:01", "05/21/2006 20:00", 
"05/22/2006 01:01", "05/22/2006 06:00", "05/22/2006 11:00", "05/22/2006 11:01", 
"05/22/2006 16:00", "05/22/2006 16:01", "05/22/2006 21:00", "05/22/2006 21:01", 
"05/23/2006 02:00", "05/23/2006 07:00", "05/23/2006 07:01", "05/23/2006 12:00", 
"05/23/2006 17:01", "05/23/2006 22:00", "05/24/2006 03:00", "05/24/2006 08:00", 
"05/24/2006 08:01", "05/24/2006 13:00", "05/24/2006 18:00", "05/24/2006 18:01", 
"05/24/2006 23:00", "05/24/2006 23:01", "05/25/2006 04:01", "05/25/2006 09:00", 
"05/25/2006 09:02", "05/25/2006 14:01", "05/25/2006 19:01", "05/26/2006 00:01", 
"05/26/2006 05:00", "05/26/2006 10:00", "05/26/2006 15:00", "05/26/2006 20:00", 
"05/27/2006 01:00", "05/27/2006 01:01", "05/27/2006 06:00", "05/27/2006 11:00", 
"05/27/2006 16:00", "05/27/2006 16:01", "05/27/2006 21:01", "05/28/2006 02:00", 
"05/28/2006 02:01", "05/28/2006 07:00", "05/28/2006 07:01", "05/28/2006 12:01", 
"05/28/2006 17:00", "05/28/2006 22:00", "05/29/2006 03:00", "05/29/2006 03:01", 
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"05/29/2006 23:01", "05/30/2006 04:00", "05/30/2006 09:00", "05/30/2006 14:00", 
"05/30/2006 14:01", "05/30/2006 19:00", "05/30/2006 19:01", "05/31/2006 00:00", 
"05/31/2006 00:01", "05/31/2006 05:01", "05/31/2006 10:00", "05/31/2006 10:01", 
"05/31/2006 15:00", "05/31/2006 15:01", "05/31/2006 20:00", "06/01/2006 01:00", 
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"06/02/2006 07:00", "06/02/2006 12:00", "06/02/2006 12:01", "06/02/2006 17:00", 
"06/02/2006 17:02", "06/02/2006 22:01", "06/03/2006 03:00", "06/03/2006 03:01", 
"06/03/2006 08:00", "06/03/2006 08:01", "06/03/2006 13:00", "06/03/2006 13:01", 
"06/03/2006 18:00", "06/03/2006 23:00", "06/04/2006 04:00", "06/04/2006 04:01", 
"06/04/2006 09:00", "06/04/2006 09:01", "06/04/2006 14:00", "06/04/2006 19:00", 
"06/05/2006 00:00", "06/05/2006 05:01", "06/05/2006 10:00", "06/05/2006 15:00", 
"06/05/2006 20:00", "06/06/2006 01:00", "06/06/2006 01:01", "06/06/2006 06:01", 
"06/06/2006 11:00", "06/06/2006 11:01", "06/06/2006 16:00", "06/06/2006 21:00", 
"06/06/2006 21:01", "06/07/2006 02:01", "06/07/2006 07:00", "06/07/2006 07:01", 
"06/07/2006 12:00", "06/07/2006 12:01", "06/07/2006 17:00", "06/07/2006 17:01", 
"06/07/2006 22:00", "06/07/2006 22:01", "06/08/2006 03:00", "06/08/2006 08:00", 
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"06/08/2006 23:00", "06/09/2006 04:00", "06/09/2006 09:00", "06/09/2006 14:00", 
"06/09/2006 19:00", "06/10/2006 00:01", "06/10/2006 00:02", "06/10/2006 05:00", 
"06/10/2006 10:00", "06/10/2006 15:00", "06/10/2006 20:01", "06/11/2006 01:00", 
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"06/11/2006 16:01", "06/11/2006 21:00", "06/12/2006 02:01", "06/12/2006 02:02", 
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"06/12/2006 17:01", "06/12/2006 22:00", "06/12/2006 22:01", "06/13/2006 03:00", 
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"06/13/2006 13:03", "06/13/2006 18:00", "06/13/2006 18:01", "06/13/2006 23:00", 
"06/13/2006 23:01", "06/14/2006 04:00", "06/14/2006 04:01", "06/14/2006 09:00", 
"06/14/2006 09:01", "06/14/2006 14:00", "06/14/2006 14:01", "06/14/2006 19:00", 
"06/15/2006 00:00", "06/15/2006 05:01", "06/15/2006 10:00", "06/15/2006 15:00", 
"06/15/2006 15:01", "06/15/2006 20:00", "06/15/2006 20:01", "06/16/2006 01:01", 
"06/16/2006 06:00", "06/16/2006 06:01", "06/16/2006 11:00", "06/16/2006 11:01", 
"06/16/2006 16:00", "06/16/2006 16:01", "06/16/2006 21:00", "06/16/2006 21:01", 
"06/17/2006 02:00", "06/17/2006 07:00", "06/17/2006 07:01", "06/17/2006 12:00", 
"06/17/2006 12:01", "06/17/2006 17:00", "06/17/2006 22:00", "06/18/2006 03:00", 
"06/18/2006 03:01", "06/18/2006 08:01", "06/18/2006 13:00", "06/18/2006 13:01", 
"06/18/2006 18:01", "06/18/2006 23:00", "06/19/2006 04:00", "06/19/2006 04:01", 
"06/19/2006 09:00", "06/19/2006 09:01", "06/19/2006 14:01", "06/19/2006 19:01", 
"06/20/2006 00:00", "06/20/2006 05:00", "06/20/2006 05:01", "06/20/2006 10:01", 
"06/20/2006 15:00", "06/20/2006 15:01", "06/20/2006 20:00", "06/21/2006 01:00", 
"06/21/2006 01:01", "06/21/2006 06:00", "06/21/2006 06:01", "06/21/2006 11:01", 
"06/21/2006 16:00", "06/21/2006 16:01", "06/21/2006 21:00", "06/21/2006 21:01", 
"06/22/2006 02:00", "06/22/2006 02:02", "06/22/2006 07:00", "06/22/2006 12:00", 
"06/22/2006 12:01", "06/22/2006 17:00", "06/22/2006 17:01", "06/22/2006 22:00", 
"06/23/2006 03:00", "06/23/2006 08:01", "06/23/2006 13:00", "06/23/2006 13:03", 
"06/23/2006 18:01", "06/23/2006 18:02", "06/23/2006 23:00", "06/24/2006 04:00", 
"06/24/2006 09:01", "06/24/2006 14:00", "06/24/2006 19:00", "06/24/2006 19:01", 
"06/25/2006 00:01", "06/25/2006 05:00", "06/25/2006 10:00", "06/25/2006 10:01", 
"06/25/2006 15:00", "06/25/2006 15:01", "06/25/2006 20:00", "06/26/2006 01:00", 
"06/26/2006 01:01", "06/26/2006 06:00", "06/26/2006 11:00", "06/26/2006 11:01", 
"06/26/2006 16:00", "06/26/2006 21:00", "06/26/2006 21:01", "06/27/2006 02:00", 
"06/27/2006 07:01", "06/27/2006 12:00", "06/27/2006 17:01", "06/27/2006 22:00", 
"06/28/2006 03:00", "06/28/2006 08:00", "06/28/2006 08:01", "06/28/2006 13:00", 
"06/28/2006 18:00", "06/28/2006 23:00", "06/28/2006 23:01", "06/29/2006 04:00", 
"06/29/2006 09:01", "06/29/2006 14:00", "06/29/2006 19:01", "06/30/2006 00:00", 
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"07/07/2006 02:00", "07/07/2006 07:00", "07/07/2006 12:01", "07/07/2006 17:00", 
"07/07/2006 22:01", "07/08/2006 03:00", "07/08/2006 08:01", "07/08/2006 13:01", 
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"07/10/2006 20:00", "07/11/2006 01:00", "07/11/2006 01:01", "07/11/2006 06:00", 
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"07/22/2006 02:00", "07/22/2006 07:01", "07/22/2006 12:00", "07/22/2006 17:00", 
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"07/27/2006 17:00", "07/27/2006 22:01", "07/28/2006 03:00", "07/28/2006 03:01", 
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"07/30/2006 15:00", "07/30/2006 20:01", "07/31/2006 01:01", "07/31/2006 01:03", 
"07/31/2006 06:00", "07/31/2006 06:01", "07/31/2006 11:00", "07/31/2006 11:01", 
"07/31/2006 16:00", "07/31/2006 21:01"), class = "factor")), .Names = c("ID", 
"Long", "Latitude", "DT"), class = "data.frame", row.names = c(1L, 
2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L, 706L, 707L, 708L, 709L, 
710L, 711L, 712L, 713L, 714L, 715L, 716L))

最佳答案

library(zoo) 可以处理不规则的时间序列，正如 Gabor 所说，Zoo FAQ 有每天聚合多个观察的方法:

z <- zoo( x=data.frame(....), order.by=loc$DateTime ) # translate 'loc' into zoo somehow 

za <- aggregate(z, identity, mean)  # take the mean of identically timed objects

...并用局部拟合数据填充缺失数据:

g  <- seq(start(z),end(z),by=1/frequency(z)) 
zi <- na.locf(z,xout=g)

关于r - 不规则时间序列数据 - 我可以让它规则吗？在 r，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/6448068/

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r - 不规则时间序列数据 - 我可以让它规则吗？在 r