This is a wrapper around msm::MatrixExp() that computes the exponential
of multiple square matrices.
expmat(x, t = 1, ...)An array of matrices.
An optional scaling factor for x.
Arguments to pass to msm::MatrixExp().
Returns an array of exponentiated matrices. If length(t) > 1, then
length(t) arrays are returned for each element in x.
This function is most useful when exponentiating transition intensity
matrices to produce transition probability matrices. To create transition
probability matrices for discrete time state transition models with annual
cycles, set t=1. An array of matrices is returned which can be used
to create the value element of a tparams_transprobs object. See
qmatrix() for an example.