5.2.2.3

• This version adds the new basic component dinit for evaluating the probability density function of the initial-state distribution. There is a corresponding workhorse function, dinit().

• The constructor pomp now takes the optional argument nstatevars, which can be used to increase the dimension of the latent state-vectors created by rinit. By default, nstatevars = length(statenames), and nstatevars can only be used to increase, not to decrease, the dimension of the latent state process. Moreover, nstatevars has no effect if the rinit basic component is furnished as an R function.

• Name checking on internally-created vectors and arrays is less strict than previously. In particular, it is possible to have variables without names (i.e., "").