prior: Some priors distributions
In StateSpaceModels/ssminr: ssminr

Distributions supported by SSM to define priors

unif(min, max)

truncnorm(a = -Inf, b = Inf, mean, sd)

dirac(value)

`min`	lower and upper limits of the distribution. Must be finite.
`max`	lower and upper limits of the distribution. Must be finite.
`a`	vector of lower bounds. These may be `-Inf`
`b`	vector of upper bounds. These may be `Inf`
`mean`	vector of means.
`sd`	vector of standard deviations.
`value`	numeric, dirac value