EW_popIMD_14            England and Wales (EW) 2014 population and
                        death rates by Index of Multiple Deprivation
                        (IMD).
EW_pop_14               England and Wales (EW) 2014 population, death
                        and birth rates.
EW_pop_out              Example of "human population" after 100 years
                        of simulation.
EWdata_hmd              England and Wale mortality data (source: Human
                        Mortality Database)
age_pyramid             Age pyramid from a population data frame at a
                        given time.
age_pyramids            Age pyramid from a population data frame at
                        some given times.
check_intensity_code    Check the intensity code.
check_interaction_code
                        Check the interaction code.
check_kernel_code       Check the kernel code.
death_table             Death table
exposure_table          Exposure table
get_characteristics     Returns names and C types of the
                        characteristics.
gompertz                Gompertz–Makeham intensity function.
linfun                  Linear interpolation function.
max.stepfun             Returns the maximum of a function of class
                        'stepfun'.
merge_pop_withid        A function returning a merged dataframe from a
                        list of population dataframes with id.
mk_event_individual     Creates an event with intensity of class
                        individual.
mk_event_inhomogeneous_poisson
                        Creates inhomogeneous Poisson class event.
mk_event_interaction    Creates an event with intensity of type
                        interaction.
mk_event_poisson        Creates Poisson class event.
mk_model                Creates a model for IBMPopSim.
piecewise_x             Piecewise real function.
piecewise_xy            Piecewise real function of two variables.
plot_population         Plot the age pyramid of a population data frame
                        (at a given time).
plot_pyramid            Plot an age pyramid from age pyramid data
                        frame.
popsample               Sample a population from an age pyramid (at a
                        given time).
popsim                  Simulation of a model.
population_alive        Returns a population of individuals alive.
stepfun                 Step Function.
summary.event           Summary of an event.
summary.model           Summary of a model.
toy_params              Toy parameters for IBMPopSim-human_popIMD
                        vignette example.
weibull                 Weibull function.
