[tlocoh-info] Removing duplicates in my data

[maja.bradaric92 at gmail.com]

Thanks everyone! I`ve managed to remove duplicates from the data. Now it works!



From: Andy Lyons
Sent: 07 October 2016 18:23
To: Sandra Smith Aguilar; Miranda Swagemakers; maja.bradaric92 at gmail.com
Cc: tlocoh-info at lists.r-forge.r-project.org
Subject: Re: [tlocoh-info] Removing duplicates in my data

Good tips. By default points with the same location, time stamp, and id (individual) are considered to be duplicates and either deleted or ignored based on the arguments passed to the xyt.lxy() function. Unexpected duplicate point errors can be difficult to diagnose, but the show.dup.dt=TRUE argument can help. The View() function will open up a data frame in something that looks like a spreadsheet, which can help you identify duplicate locations, garbled time stamps, etc. If you still have problems feel free to post your console output and we'll take another look. Best, Andy

On 10/7/2016 7:38 AM, Sandra Smith Aguilar wrote:
Hi Maja,

I had that problem as well. I suggest turning the option to show duplicates to TRUE because usually it gives you a list of the positions it is registering as duplicates so you can see what the problem is. At some point I would not get the list of duplicates even though it had them because the function was bumping into anther problem due to a few lines in my database with had NA's instead of valid position values, but once i made sure there were no empty positions, the duplicate list showed up. Another possibility: since you said you have added more than one animal, maybe there is a problem indicating the ID field which is causing T-LoCoH not to realize it is dealing with more than one individual. Make sure the id argument is set to the id field for each of your individuals. 

Cheers,
Sandra


From: Miranda Swagemakers <mswagem1 at gwdg.de>
To: maja.bradaric92 at gmail.com 
Cc: tlocoh-info at lists.r-forge.r-project.org
Sent: Friday, October 7, 2016 9:01 AM
Subject: Re: [tlocoh-info] Removing duplicates in my data

Hi Maja,
I think you're encountering a new kind of duplicate here. If I remember correctly, the dupes that get removed from the data set under the default settings are the ones that have the same location and time.
The duplicates that you run into when making the lxy object are the once where the time is the same, but the locations are different. Those kind of dupes shouldn't occur (an animal can't be in two places at the same time), so you need to handle them somehow. I think there's an option somewhere to jitter the times?
If that isn't the problem, maybe post the exact error message?
Good luck,
Miranda
On Oct 7, 2016, at 15:05, maja.bradaric92 at gmail.com wrote: 
Hello,
 
I`ve just started to use T-LoCoH package for my data analysis. In the begining, when I tried it with my GPS data for just one individual, it worked well. Now, I am trying to apply the codes on data I have about one species and after I make lxy object and plot it, no further actions are possible, since it keeps to send error messages about duplicates, even though it said that certain number of them was removed immediately after I created my lxy object. I tried to disable duplicate check, I`ve tried to repair the lxy object, but it didn`t work. 
 
Do you have any suggestions on how should I fix it?
 
Thanks in advance.
 
Maja


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