initial assignment and repeated assignment problem

How I know that when I need to use initial assignment and repeated assignment ? And what is the purpose of those two tools ? thank you !

Answer 1

[emjey]

The initial assignments are used to assign initial values of a species, e.g. tumour size, inital concentrations of the species in your model. But also to calculate a model parameter at the begining of the simulation, e.g. baseline tumour volume given inital tumour cell number.

A repeated assignment could be used to update a parameter one would create to express an outcome of your model which is not a specie. Examples are: the volume of the tumour (calculated based on growing/shrinking tumour cell number), total sum of certain cells in your model, i.e. all immune cells, at any time point.

For detailed overview, see assignments in SimBiology

[Lo]

thanks this is very helpful for me!