[R-sig-Geo] mcp calculation

[Mathieu Basille]

Dear Lutfor,

It should work out of the box with the current version of adehabitatHR, 
which does not rely on gpclib for MCP estimations. Here is an example using 
R 3.0.2 and adehabitatHR 0.4.10:

## Load adehabitatHR
library(adehabitatHR)

## This give me:
#
# Loading required package: sp
# Loading required package: deldir
# deldir 0.1-1
# Loading required package: ade4
#
# Attaching package: ‘ade4’
#
# The following object is masked from ‘package:base’:
#
#     within
#
# Loading required package: adehabitatMA
# Loading required package: adehabitatLT
# Loading required package: CircStats
# Loading required package: MASS
# Loading required package: boot
#
## As you can see, gpclib is not loaded.

## Load example data
data(puechabonsp)
rel <-  puechabonsp$relocs

## Estimates the MCP
cp <- mcp(rel[,1])

## The home-range size
as.data.frame(cp)
#          id     area
# Brock Brock 22.64670
# Calou Calou 41.68815
# Chou   Chou 71.93205
# Jean   Jean 55.88415

## Computation of the home-range size:
mcp.area(rel[,1])
#        Brock    Calou      Chou      Jean
# 20   2.01000  8.06000  15.74195   1.13685
# 25   2.05565  9.96440  16.11330   1.48680
# 30   2.44080 13.27520  16.67075   1.69070
# 35   6.46570 13.65330  18.04590   2.33475
# 40   7.01845 14.88035  22.65340   4.09565
# ...

Hope this helps,
Mathieu.


Le 11/27/2013 05:31 PM, Lutfor a écrit :
> Dear forum members,
>
> Today, I upgraded my R with 3.0.2. I was going to use my old code for MCP
> calculation using adehabitat. But when I was going use mcp.area calculation
> it says, i do need gpclib. Unfortunately new version of R don't have gpclib
> packages. I was trying to do with adehabitatHR but now luck yet. could
> anyone help to calculated mcp.area from my data.
>
> I have used following code for my calculation.
>
> mcpdata1<-read.csv("DataMCPKernel.csv",header=T)
> attach(mcpdata1)
>
> XY=mcpdata1[,c("x","y")]
> id=mcpdata1[,c("Stage")]
>
> HrMcp<-mcp.area(XY,id)
> #When I do run above command following error message pop up.
> Loading required package: gpclib
> Failed with error:  ‘‘gpclib’ is not a valid installed package’
> Error in mcp.area(XY, id) : package gpclib required
>
> I would greatly appreciate if you get me any suggestion (I tried to follow
> adehabitatHR example but sorry to say not having any luck with my data).
>
> My data:
>
> Stage	            x	            y
> incubation	646446.9	5213729
> incubation	646395.1	5213765
> incubation	646395.1	5213765
> incubation	646395.1	5213765
> incubation	646382.5	5213783
> incubation	646395.1	5213765
> incubation	646395.5	5213746
> incubation	646665	5213605
> incubation	645684.8	5213821
> incubation	646396	5213727
> incubation	648337.4	5214609
> incubation	643467.4	5214935
> incubation	646395.1	5213765
> incubation	642319.7	5214203
> incubation	646244.7	5214224
> incubation	643306.7	5214227
>
> Kind regards
> Lutfor
>
>
>
> --
> View this message in context: http://r-sig-geo.2731867.n2.nabble.com/mcp-calculation-tp7585219.html
> Sent from the R-sig-geo mailing list archive at Nabble.com.
>
> _______________________________________________
> R-sig-Geo mailing list
> R-sig-Geo at r-project.org
> https://stat.ethz.ch/mailman/listinfo/r-sig-geo
>

-- 

~$ whoami
Mathieu Basille, PhD

~$ locate --details
University of Florida \\
Fort Lauderdale Research and Education Center
(+1) 954-577-6314
http://ase-research.org/basille

~$ fortune
« Le tout est de tout dire, et je manque de mots
Et je manque de temps, et je manque d'audace. »
  -- Paul Éluard