A function computing variance for a given distribution.
distr_var(f, distr, param =NULL, par_link =NULL)
Arguments
f: Parameters. For the same parameters for all observations, a numeric vector. For individual parameters for each observation, a numeric matrix with rows corresponding to observations.
distr: A distribution.
param: A parametrization of the distribution.
par_link: An optional logical vector indicating whether the logarithmic/logistic link should be applied to restricted parameters in order to obtain unrestricted values. Defaults to keeping the original link for all parameters.
Returns
The variance.
Examples
# Variance for the negative binomial distributiondistr_var(f = c(13.50,0.03), distr ="negbin")