[R] create zoo object within a for loop

[David Winsemius]

On Oct 15, 2015, at 4:07 AM, Wiebke Ullmann wrote:

> Dear everyone.
> 
> I have a data frame with relocation data of several animals
> 
>> head(data)

It would be better to post output of dput(head(data))

> 
>                            timestamp
> 
> 
>  individual
> 
> 
>  easting
> 
> 
>  northing
> 
snipped larg amount of useless output

> 
> I know how to do this with a data frame that only includes the information of one animal. I used an index in zoo:
> 
>> animal1$time <- strptime(animal1$timestamp, format="%Y-%m-%d %H:%M:%S")
>> animal1$time <- as.POSIXct(format(round(animal1$time, units="hours"), 
>                                         format="%Y-%m-%d %H:%M"))
>> animal1.zoo  <- zoo(animal1[,-5],animal1[,5]) #set Index
>> animal1m     <- merge(animal1.zoo,
>                       zoo(,seq(animal1[1,5],animal1[length(animal1$timestamp),5],by="hour")), 
>                           all=TRUE)
> 
> And filled the other variables with na.locf.
> 
> But I do not know how to do this in one go for all the animals. I would like to use a for loop or lappy for lists.
> I would be very glad if you could help me out. Thank you very much in advance.
> 
> Cheers,
> Vivi
> 		 	   		  
> 	[[alternative HTML version deleted]]

You need to change settings in your mail client so you are adhering to the plain-text requirements of the mail-server offered by ETHZ. And please read the posting guide.


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David Winsemius
Alameda, CA, USA