[R] Sort by timestamp

[j.k]

Works perfect!!

Thanks a lot...

Cheers
Johannes



Arien Lam wrote:
> 
> Good morning Johannes,
> 
> This might help. Try:
> 
> df <- data.frame(V1=as.factor(c('2008-10-14 09:10:00','2008-10-14
> 9:20:20','2008-10-14 08:45:00')),V2=runif(3))
> 
> df           # is a dataframe, just as yours
> 
> class(df$V1) # is a factor, just as yours. See ?factor
>              # This will probably not be ordered
>              # in a way you like.
> 
> df$V1 <- as.POSIXct(df$V1, tz='CET') # makes it a time. See ?POSIXct
> 
> class(df$V1) # is a POSIX time now
> 
> df2 <- df[do.call(order, df), ] # see ?order
> 
> df2          # sorted in a way you like
> 
> 
> Cheers, Arien
> 
> 
> On Thu, March 26, 2009 08:54, j.k wrote:
>>
>> #Good morning alltogheter. I'm using R for a short time to analyse
>> TimeSeries
>> and I have the following Problem:
>> #I have a bunch of Time Series:
>> #First of all I import them from a txt File
>>
>> data.input01 <-read.csv("./LD/20081030.txt", header = TRUE, sep = ";",
>> quote="\"", dec=",", fill = TRUE, comment.char="")
>> data.input02 <-read.csv("./LD/20090305.txt", header = TRUE, sep = ";",
>> quote="\"", dec=",", fill = TRUE, comment.char="")
>> data.input03 <-read.csv("./LD/20081114.txt", header = TRUE, sep = ";",
>> quote="\"", dec=",", fill = TRUE, comment.char="")
>> data.input04 <-read.csv("./LD/20081201.txt", header = TRUE, sep = ";",
>> quote="\"", dec=",", fill = TRUE, comment.char="")
>> data.input05 <-read.csv("./LD/20081219.txt", header = TRUE, sep = ";",
>> quote="\"", dec=",", fill = TRUE, comment.char="")
>> data.input06 <-read.csv("./LD/20090107.txt", header = TRUE, sep = ";",
>> quote="\"", dec=",", fill = TRUE, comment.char="")
>>
>> #After the import they look like that:
>>
>>                   V1       V2
>> 1  2008-10-14 08:45:00 92130.68
>> 2  2008-10-14 08:50:00 94051.70
>> 3  2008-10-14 08:55:00 97050.85
>> 4  2008-10-14 09:00:00 81133.81
>> 5  2008-10-14 09:05:00 70705.40
>> 6  2008-10-14 09:10:00 75213.92
>> 7  2008-10-14 09:15:00 90876.14
>> 8  2008-10-14 09:20:00 85995.17
>>
>> #Next steps are to combine them with rbind and sort duplicates out
>>
>> data.troughput01 <-
>> rbind(data.input03,data.input01,data.input04,data.input02,data.input05,data.input06)
>> data.troughput02 <- unique(data.troughput01)
>>
>> #The Problem is that the dates are mixed and I want to sort/order them by
>> the date and time.
>> #The class of the Date/time is as followed:
>> class(data.input01$V1)
>> [1] "factor"
>>
>> # I've already tried sort and order but it didn't work
>> #Are there any suggestions, how I can solve this issue??
>>
>> Thanks in advance
>> Johannes
>>
>> --
>> View this message in context:
>> http://www.nabble.com/Sort-by-timestamp-tp22717322p22717322.html
>> Sent from the R help mailing list archive at Nabble.com.
>>
>> ______________________________________________
>> R-help at r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide
>> http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>>
> 
> 
> -- 
> drs. H.A. (Arien) Lam (Ph.D. student)
> Department of Physical Geography
> Faculty of Geosciences
> Utrecht University, The Netherlands
> 
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
> 
> 

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