An S4 class contains the information of features used to fit a model
vars
A character vector containing the name of variabes from the dataset used to generate the features
feature.types
A list containing the definition of features
response.specific
NULL, or a list containing the definition of features that their definitions are according to the response variable (i.e. species)
Babak Naimi naimi.b@gmail.com
Naimi, B., Araujo, M.B. (2016) sdm: a reproducible and extensible R platform for species distribution modelling, Ecography, DOI: 10.1111/ecog.01881