Calculates a vector of probabilities given a vector of rates vlambda using the matrix exponential function from Bates and Maechler (2012).
EPPMprob(vlambda)
The value returned is a vector of probabilities.
vlambda is a vector of rates of an extended Poisson process.
David M. Smith <dmccsmith@verizon.net>
Bates D, Maechler M (2023). Matrix: Sparse and Dense Matrix Classes and Methods. R package version 1.6-4, https://CRAN.R-project.org/package=Matrix.