T2 - How to build your model

In the previous tutorial we mentioned model ingredients. Within Starsim, these are the ingredients of an epidemic, namely:

• people: the population who will experience the epidemic;
• demographics: how characteristics of this population change over time
• (contact) networks: describing how people interact
• diseases: describe the natural history of a pathogen in individuals and handle the transmission of the pathogen
• interventions: can modify aspects of any of the ingredients above.
• analyzers: for reporting results of a simulation, they collect data from the simulation in a specific way (ie, by age and by sex) and plot them. For more details, have a look at the Starsim tutorial on how to build your own analyzer.

In this tutorial we’ll specify the same model as we did before, but you will notice that people is specified as an ‘ingredient’. Other ingredients wil be covered later.

import starsim as ss
import typhoidsim as ty

# Define high-level simulation parameters
pars = dict(
    start    = 2000,  # Starting year
    dur      = 1.0,   # Duration of the simulation in years
    dt       = 1.0/365.0,     # Timestep of 1 day, expressed in years
    verbose  = 0,             # Do not print details of the run
)

# The population
ppl = ss.People(10_000)

# The disease 
typhoid = ty.Typhoid()

sim = ss.Sim(
    pars=pars,
    people=ppl, ## People is now specified as an ingredient
    diseases=typhoid,
    )
sim.run()
sim.plot()

Figure(1024x768)