Displaying 20 results from an estimated 600 matches similar to: "adehabitat version 1.2"
2006 Feb 23
0
adehabitat version 1.4
Dear all,
I have just uploaded to CRAN the version 1.4 of the
package 'adehabitat'. Significant changes are
listed below:
- The eigenanalysis of selection ratios (Calenge and Dufour, 2006, Ecology)
can now be performed using the function eisera(). It can be used for
the analysis of
habitat selection when habitat can be considered to consist of several
habitat types
(e.g.
2006 Feb 23
0
adehabitat version 1.4
Dear all,
I have just uploaded to CRAN the version 1.4 of the
package 'adehabitat'. Significant changes are
listed below:
- The eigenanalysis of selection ratios (Calenge and Dufour, 2006, Ecology)
can now be performed using the function eisera(). It can be used for
the analysis of
habitat selection when habitat can be considered to consist of several
habitat types
(e.g.
2005 May 12
0
Package adehabitat version 1.3
Dear all,
I have just uploaded to CRAN the version 1.3 of the
package 'adehabitat'. Significant changes are
listed below:
- Several functions allowing the conversion from
and to classes of the package sp have been added.
Maps of class "asc", "kasc", "area", as well as
radio-monitoring of class "traj" can now be
converted to the spatial
2005 May 12
0
Package adehabitat version 1.3
Dear all,
I have just uploaded to CRAN the version 1.3 of the
package 'adehabitat'. Significant changes are
listed below:
- Several functions allowing the conversion from
and to classes of the package sp have been added.
Maps of class "asc", "kasc", "area", as well as
radio-monitoring of class "traj" can now be
converted to the spatial
2007 May 31
0
adehabitat version 1.6
Dear all,
I have just uploaded to CRAN the version 1.6 of the
package 'adehabitat'. Significant changes are
listed below:
* The package has been reorganized into four parts (see
?adehabitat-package for a description): (i) management of raster maps,
(ii) habitat selection / ecological niche analysis, (iii) home range
analysis, and (iv) analysis of animals trajects. The package contains
2007 May 31
0
adehabitat version 1.6
Dear all,
I have just uploaded to CRAN the version 1.6 of the
package 'adehabitat'. Significant changes are
listed below:
* The package has been reorganized into four parts (see
?adehabitat-package for a description): (i) management of raster maps,
(ii) habitat selection / ecological niche analysis, (iii) home range
analysis, and (iv) analysis of animals trajects. The package contains
2006 Oct 30
0
adehabitat version 1.5
Dear all,
I have just uploaded to CRAN the version 1.5 of the
package 'adehabitat'. Significant changes are
listed below:
* the package now contains a new function allowing a factorial
decomposition of the Mahalanobis distances in habitat selection studies,
named madifa().
* The ENFA can now be performed using all kinds of variables (numeric,
factors, fuzzy, mixing of several types,
2006 Oct 30
0
adehabitat version 1.5
Dear all,
I have just uploaded to CRAN the version 1.5 of the
package 'adehabitat'. Significant changes are
listed below:
* the package now contains a new function allowing a factorial
decomposition of the Mahalanobis distances in habitat selection studies,
named madifa().
* The ENFA can now be performed using all kinds of variables (numeric,
factors, fuzzy, mixing of several types,
2004 Sep 24
0
New package: adehabitat
Dear all,
I have just uploaded a package to CRAN a new package called 'adehabitat'.
This package is intended for ecologists who want to analyse the use of
space by animals.
Many functions currently used in this field are available to
highlight habitat selection by animals (selection ratios, ENFA, habitat
suitability maps
with the algorithm DOMAIN or Resource Selection Functions)
or to
2004 Sep 24
0
New package: adehabitat
Dear all,
I have just uploaded a package to CRAN a new package called 'adehabitat'.
This package is intended for ecologists who want to analyse the use of
space by animals.
Many functions currently used in this field are available to
highlight habitat selection by animals (selection ratios, ENFA, habitat
suitability maps
with the algorithm DOMAIN or Resource Selection Functions)
or to
2007 Sep 03
0
adehabitat version 1.7
Dear all,
I have uploaded to CRAN the version 1.7 of the package 'adehabitat'.
Significant changes are listed below:
* The Brownian bridge kernel estimation algorithm has been greatly
improved. It now takes more than 80% less time than the previous
version. A new function "liker" has also been added, which estimates the
one of the two smoothing parameters of the bridge
2007 Sep 03
0
adehabitat version 1.7
Dear all,
I have uploaded to CRAN the version 1.7 of the package 'adehabitat'.
Significant changes are listed below:
* The Brownian bridge kernel estimation algorithm has been greatly
improved. It now takes more than 80% less time than the previous
version. A new function "liker" has also been added, which estimates the
one of the two smoothing parameters of the bridge
2007 Dec 04
1
How can I use Adehabitat to obtain an .asc object with the predicted values of a niche model?
Dear all,
I'm using the package adehabitat in R to import several .asc files
(=matrix),
and also create a kasc object (=dataframe) with all of them.
The main idea is to use this kasc object to map the predicted values of
climate-matching model for an overall area. However, I don't know how to
proceed: Do I have to project the model (already stored in R) onto the kasc
object directly, or
2010 Apr 10
0
adehabitat raster import
Hello all,
I'm new to adehabitat and am having trouble getting my ascii files into the r.
I have 45 environmental data layers that are all stored in a folder as ascii
files. Is there an easy way to pull in all 45 of my data layers into a kasc
dataframe. I'm not new to r or multivariate modeling, but the documentation
seems confusing.
I've experimented with bringing a few of them in 1
2005 Apr 14
1
Strange behavior of atan2
Dear all,
I've got a problem with the function atan2. For a couple of coordinates
x and y,
This function returns the angle between the vector of coordinates (x, y)
and the
abscissa axis, i.e. it is the same as atan(y/x) (as indicated on the
help page).
If we consider the vector with coordinates x = 0 and y = 0, we have
the following result:
> atan(0/0)
[1] NaN
This is expected.
2008 Oct 27
0
adehabitat version 1.8
Dear all,
I have uploaded to CRAN the version 1.8 of the package 'adehabitat'.
Significant changes are listed below:
* getverticeshr now relies on the function contourLines(), and returns
smoother estimates of the kernel home range (see the help page).
* the new function kernelkc (and related functions) now allows the
estimation of the utilization distribution in space and time of
2013 Feb 12
1
AUC from ENFA model
Dear all,
I am currently running an ENFA in R using Adehabitat pkg to assess species
distribution and I am really stuck and need some help to finalize my
project.
I run the ENFA in both original location data and pseudo-absence points
(the latter randomly generated using dismo pkg), and now I would like to
assess the performance of the ENFA, however, I am not sure about how to
tackle this. I
2008 Apr 22
4
Modeling presence only data in R
Dear All,
I have a set of environental maps and presence-only points for some species.
How can I generate distributions models on R using these presence-only data?
What packages and functions can I use to do so?
Kind regards,
Miltinho
Brazil
[[alternative HTML version deleted]]
2013 Feb 11
0
Error in R (ENFA) : Error in eigen(Se) : infinite or missing values in 'x'
Dear all,
I am running an Ecological Niche Factor Analysis in R but I am stuck with a
problem. As soon as I ask the software to compute the ENFA, I get the
following error message:
Error in eigen(Se) : infinite or missing values in 'x'
Does anyone know what could be wrong. I do not have missing values in my
dataset.
Please follow the codes I used for my analysis so far:
library
2011 Feb 09
0
adehabitatMA, LT, HR and HS version 0.1
Dear all,
I have just uploaded 4 new packages on CRAN, which are on the long term
designed to replace the "old" package adehabitat:
* adehabitatMA: functions to perform spatial operations (morphology,
buffer, etc.)
* adehabitatHS: functions for the analysis of habitat selection by wildlife
* adehabitatHR: functions for home range estimation of animals
* adehabitatLT: functions for