[AniMov] Adehabitat: creating MCPs every two weeks for 32 different animals

[clement.calenge at oncfs.gouv.fr]

Hello Kristiina,


> Error in mcp(xy, id) :
> At least 5 relocations are required to fit an home range
> However, when I make the data into a traj or try table(id), they both 
> tell me that all my animals have 10-13 relocations. Yet, when I tried 
> this,
> > any(table(id)<5)
> [1] TRUE
> but I was unable to find the erroneous animal.
> > ta <- table(id)<5
> > ta[ta<5]

Be careful here, the correct code should be:
ta <- table(id)
ta[ta<5]
The code should then work,
Best regards,

Clément Calenge


> id
> S05_63007 S05_7207 S05_7507 S05_7607 S11_72407 S17_81407 S17_81507
> FALSE FALSE FALSE FALSE FALSE FALSE FALSE
> SG_72307 SG_72407 SG_72607 SG_72707 X01A_71108 X07_71008 X07_71108
> FALSE FALSE FALSE FALSE FALSE FALSE FALSE
> X07_7808 X07_7908 X08_71008 X09_71908 X13_72308 X16_72508 X16_72608
> TRUE FALSE FALSE FALSE FALSE FALSE FALSE
> X16_73008 X17_72608 X17_72808 X17_8108 X19_72808 X19_72908 X19_73108
> FALSE FALSE FALSE FALSE FALSE FALSE FALSE
> X20_73008 X21.23_8408 X21.23_8508 X22_8608 X22_8708 X25_8408 X39_11708
> FALSE FALSE FALSE FALSE FALSE FALSE FALSE
> X39.40_11808 Y1.2_7908
> FALSE FALSE
>
> I followed your advice, and did
> > out <- names(ta[ta<5])
> > pc <- mcp(xy[!(id%in%out),], factor(id[!(id%in%out)]))
> Error in apply(df.t, 1, dist.cdg) : dim(X) must have a positive length
> In addition: Warning message:
> In min(table(id)) : no non-missing arguments to min; returning Inf
> but can't get any further.
> Please advise! Thank you for your time. I tried the code on a subset 
> of my data and it produced MCPs and I'm very excited to see them for 
> all of the data!
> sincerely,
> Kristiina
>
>
> Kristiina Hurme
> Doctoral Candidate
> Dept. of Ecology and Evolutionary Biology
> University of Connecticut
> Storrs, CT 06269
> kristiina.hurme at uconn.edu <mailto:kristiina.hurme at uconn.edu>
> http://web.me.com/kjhurme/insularum/Home.html
> www.ristohurme.com/insularum.htm <http://www.ristohurme.com/insularum.htm>
>
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-- 
Clément CALENGE
Cellule d'appui à l'analyse de données
Direction des Etudes et de la Recherche
Office national de la chasse et de la faune sauvage
Saint Benoist - 78610 Auffargis
tel. (33) 01.30.46.54.14

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