[R-sig-Geo] Maxent and Maxlike data.frame methods

[Gerardo Martin]

Hi, I', trying to implement a series of species distribution models. I 
am working with seasonal data and as I want to project them to several 
different scenarios, i need to use strictly samples with data format. I 
have extracted the background and pseudoabsences points from their 
corresponding raster files, so nos i want to fit the maxlike and maxent 
models and then project them with different rasterStack objects. The 
problem is that i haven't found out if there's a data.frame method for 
maxlike, there's no reference to such a thing in the reference manual. 
Besides, for maxent, the sdm vignete only describes how to run maxent 
with a rasterStack. I have found out how to specify pseudoabsences for 
maxent providing a vector with 1's and 0's, but no method as to specify 
a data frame with the background data.

Regards

Gerardo