#iniialize a simple process and show its summary
FVDDP = initialize(2, function(x) rgeom(x, .25),
function(x) dgeom(x, .25), TRUE)
FVDDP = update(FVDDP, rpois(4, 2))
FVDDP = propagate(FVDDP, 0.5)
summary(FVDDP)
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