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FANTER analysis with abundance data

2 messages · Carolina Soto Navarro, Mathieu Basille

Original
Carolina Soto Navarro
# 
I'd like to implement the FANTER analysis, described in Calenge
& Basille (2008)but I have a problem with the vector of utilization weights...

In the adehabitat examples, the authors use the code

Dp <- count.points(locs, kasc)[litab$index]

to get the named vector of utilization weights (calculated by numbering the
locations of chamois groups in each pixel of the map) but in my case what
I have is an excel file with the number of tracks per grid (not georeferenced)
detected of my specie standardized to 1 so I would like to know how can I
use this dataset to perform this analysis because as I understand this is
already a vector of utilization weights but I dont know how to import it to R.

Thanks!!

Carolina
17 days later
Mathieu Basille
# 
Dear Carolina,

Please update to the new version of the package (adehabitatHS), which now 
uses sp spatial classes. The example now shows:

Dp <- slot(count.points(locs,map), "data")[,1]

which is exactly comparable to your spreadsheet. If you can associate each 
row of the weight table to the corresponding row (pixel) of the 
environmental variables, you're done.

Hope this helps,
Mathieu.


Le 04/09/2012 06:59, Carolina Soto Navarro a ?crit :