1. A method, comprising: obtaining available sample values Yi associated with a reservoir; computing, using a computing device, a maximum entropy assignment λ of one or more discrete probabilities Pi(Yi) each of the discrete probabilities Pi(Yi) associated with one or more of the available sample values Yi, where each of the discrete probabilities Pi(Yi) represents a probability that one or more variables Y will take a set of particular values Yi; and performing at least one determination regarding the reservoir using the maximum entropy assignment λ and the computing device, including approximating a continuous probability distribution P(Y) using a sum of probability distributions Pi(Yi)+/−λ.