infprobs_to_probs_of_each_area_from_relprobs: Convert relative probabilities matrix to the probabilities of presence in each area
Description
Biogeographic inference in LAGRANGE and DIVA has focused
heavily on inference of the exact ancestral
state/geographic range. However, when the state space is
large, there is often considerable uncertainty in the
exact ancestral range. Even the ancestral state that
confers the maximum likelihood on the data, and thus is
the most probable ancestor, may have less than 50
probability, or even less (25
size of the state space. This function converts the
probability of specific states/geographic ranges into the
probability of presence/absence in each area. This can
typically be inferred with much higher confidence.