[R-sig-Geo] Problem in ENFA: infinite or missing values

[Perry Beasley-hall]

Hello everyone,
I'm trying to do an ENFA using the package adehabitatHS. I'm following the example code and am creating the 'pr' file using:

pr <- slot(count.points(species, map), "data")[,1]

Where 'species' is a .csv file with two columns of latitude and longitude, and 'map' is a SpatialGridDataFrame file of 23 .asc inputs. For reference, I'm importing my .asc files using readGDAL and then using the cbind command to put them into the 'map' file.

I encounter the following warning message when trying to create 'pr':

1: In points2grid(points, tolerance, round) :
  grid has empty column/rows in dimension 1
2: In points2grid(points, tolerance, round) :
  grid has empty column/rows in dimension 2

I assumed this would be alright, but I'm getting the subsequent error when I attempt the enfa command:

enfa1 <- enfa(pc, pr, scannf = FALSE)

Error in eigen(Se) : infinite or missing values in 'x'

Some searching online has told me that this might mean not all of my rows in the 'species' .csv correspond to variables in the 'map' file, but I don't think this is the case for my dataset.

Can anyone help me with this issue? Many thanks in advance.
____

Perry Beasley-Hall
PhD Candidate
School of Life and Environmental Sciences

THE UNIVERSITY OF SYDNEY
Room 329, Edgeworth David Building A11
Sydney NSW 2006, Australia
E-mail: perry.beasley-hall at sydney.edu.au
Phone: +61 420 494 584

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