I want to run a univariate sensitivity analysis on a few individual parameters in an SEIR-type model to see how they affect disease transmission dynamics. I want to see how changes in the parameter values affect population statistics. However, I cannot figure out how to access the population statistics from the sensitivity analysis experiment.

Under the Main object of my model, I have an agent named population which has a few statistics named NSusceptible and NExposed and the like. These are defined using the conditions agent.inState( Individual.Susceptible ) and agent.inState( Individual.Exposed ) and so on.

In the default simulation, I created a Time Stack Chart and I was able to add these statistics to my chart without problem by calling population.NSusceptible() and the like for the values.

I’ve tried to recreate the same Time Stack Chart within the sensitivity analysis experiment, but I can’t seem to access the population agent. I’ve tried population.NSusceptible() and Main.population.NSusceptible(), but neither seems to work (I get a population cannot be resolved error).

I’ve tried playing around with IntelliSense but I haven’t been able to figure out how I can access these statistics from within the sensitivity analysis.

Does anyone know how to do this?