convert a marginal into a transition matrix — transition_from

internal function to generate a transition matrix from a marginal

Usage

transition_from_marginal(m, direction)

Arguments

m: a marginal
direction: the desired transition direction, either "forward" or "backward"

Value

a transition matrix formulated such that you multiply the matrix by a distribution to project the distribution. See get_transition() for more details.

Details

this is called from get_transition(). If at some point we decide to store transitions rather than marginals it will also be called from import_birdflow().