Gamma distribution

A gamma distribution as a <dist_spec>, given either by its natural parameters shape/rate (or shape/scale) or by its mean/sd.

Usage

Gamma(shape, rate, scale, mean, sd, ...)

Arguments

shape, scale

shape and scale parameters. Must be positive, scale strictly.

rate

an alternative way to specify the scale.

mean, sd

Mean and standard deviation of the distribution, as an alternative to shape/rate.

...

Limits of the distribution, passed to bound_dist().

Value

A <dist_spec>.

See also

Distributions for an overview and the other distributions.

Examples

Gamma(mean = 4, sd = 1)
#> - gamma distribution:
#>   shape:
#>     16
#>   rate:
#>     4
Gamma(shape = 16, rate = 4)
#> - gamma distribution:
#>   shape:
#>     16
#>   rate:
#>     4
Gamma(shape = Normal(16, 2), rate = Normal(4, 1))
#> - gamma distribution:
#>   shape:
#>     - normal distribution:
#>       mean:
#>         16
#>       sd:
#>         2
#>   rate:
#>     - normal distribution:
#>       mean:
#>         4
#>       sd:
#>         1