This works out the mean of all the (parametric / nonparametric) delay distributions combined in the passed <dist_spec>.

## Usage

```
# S3 method for class 'dist_spec'
mean(x, ..., ignore_uncertainty = FALSE)
```

## Examples

```
# A fixed lognormal distribution with mean 5 and sd 1.
dist1 <- LogNormal(mean = 5, sd = 1, max = 20)
mean(dist1)
#> [1] 5
# An uncertain gamma distribution with mean 3 and sd 2
dist2 <- Gamma(
mean = Normal(3, 0.5), sd = Normal(2, 0.5), max = 20
)
#> Warning: ! Uncertain gamma distribution specified in terms of parameters that are not
#> the "natural" parameters of the distribution shape and rate.
#> ℹ Converting using a crude and very approximate method that is likely to
#> produce biased results.
#> ℹ If possible it is preferable to specify the distribution directly in terms of
#> the natural parameters.
mean(dist2)
#> [1] NA
# The mean of the sum of two distributions
mean(dist1 + dist2)
#> [1] 5 NA
```