Evaluates the prevalence of a list of features in the whole dataset and per each class

Evaluate the prevalence of a given model

Usage

getFeaturePrevalence(features, X, y = NULL, prop = TRUE, zero.value = 0)

features:: a list of features or features indexes for which we wish to compute prevalence
X:: dataset where to compute the prevalence
y:: if provided it will also compute hte prevalence per each class (default:NULL)
prop:: weather to compute the prevalence in number or as a proportion (default:TRUE)
zero.value:: the value that specifies what is zero. This can be a different than 0 in log transformed data for instance (default = 0)

A list containing the prevalence in the whole dataset as well as classes (if provided)