Dear everyone,
as far as I understood the setNA function in adhabitat is there to produce rows
in a location dataset that have not been recorded by the GPS collar. I just can
not figure out where the problem is. Hope somebody can help me.
>daten$timestamp <- strptime(daten$study.local.timestamp,
format="%Y-%m-%d %H:%M")
>format(round(daten$timestamp, units="hours"),
format="%Y-%m-%d %H:%M:%S")
>daten$timestamp <-
as.POSIXct(daten$timestamp,format="%Y-%m-%d %H:%M:%S")
>u<-as.ltraj(daten[,c("utm.easting","utm.northing")],
daten$timestamp,id=daten$tag.local.identifier,
infolocs=daten[,c("tag.local.identifier",
"individual.local.identifier")])
>head([[1]])
x
y date dx dy dist
407063.1
5911535 2014-05-12 16:00:00 53.75844
-8.434472e+01 100.0200
407116.9
5911451 2014-05-12 17:00:00 -417115.85704 -5.921450e+06 5936122.8652
-9999.0 -9999
2014-05-12 18:00:00 0.00000 0.000000e+00 0.0000
-9999.0 -9999
2014-05-12 20:00:00 417008.07372 5.921561e+06 5936226.4139
407009.1
5911562 2014-05-12 21:00:00
156.63876 1.096218e+02 191.1874
407165.7
5911672 2014-05-12 23:00:00
NA NA NA
dt R2n abs.angle
rel.angle
3600
3.523851e+13 -1.0033541 -2.5038352
3600
3.523755e+13 -1.6411217 -0.6377675
7200
0.000000e+00 NA NA
3600
0.000000e+00 1.5004904 -3.1415732
7200
3.523878e+13 0.6106172 -0.8898732
NA 3.524021e+13 NA NA
>nex <- setNA(u,u[[1]]$date[1], 1*3600)
Fehler in
FUN(X[[i]], ...) :
ltraj
contains irregular data (time lag > or < tol)
If you need any additional information on what I have done I am happy to provide
it (I am
not sure what you need to be able to help).
Thank you soo much in advance.
Cheers,
Wiebke
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