Get or set the parameters of a distribution, if applicable. See details.
Value
A list of the distribution parameters. More specifically,
returns the "parameters" entry of the list making up the
probability distribution.
Details
If a distribution is made by specifying parameter values
(e.g., mean and variance for a Normal distribution; shape parameters
for a Beta distribution), it is useful to keep track of what
these parameters are. This is done by adding parameters
to the list of objects defining the distribution; for instance,
distribution(parameters = c(shape1 = 1.4, shape2 = 3.4)).
Note that no checks are made to ensure the parameters are valid.
It's important to note that, in this version of distionary,
manually changing the parameters after the distribution has been
created will not change the functionality of the distribution,
because the parameters are never referred to when making calculations.
Examples
a <- dst_beta(1, 2)
parameters(a)
#> $shape1
#> [1] 1
#>
#> $shape2
#> [1] 2
#>
b <- distribution(mean = 5)
parameters(b)
#> NULL
parameters(b) <- list(t = 7)
parameters(b)
#> $t
#> [1] 7
#>