SimBiology

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Hi, I have a model in simbiology where I am using a dummy parameter to control the concentration of an inhibitor in a reaction (michaelis-menten inhibitor function). Basically, I have a rate rule controlling the concentration of the inhibitor species that sets it to 0 at a certain time, and this instantaneous change to 0 is controlled by the dummy parameter "event" (time>=24 & event == 1) which enables me to run my model according to 2 sets of experimental configurations; with and without the event. I want to fit this model against experimental data in which 1 of the columns in my data set contains a 0 or 1 depending on whether the event was performed. Is it possible to fit the model parameters using the "fit data" task, setting it up such that the dummy "event" parameter I have placed in the model is set using the value 0 or 1 in the column in the data set? (i.e IF data = 1, event = 1). I use IF statements with dummy parameter values as switches quite a lot to control parameter and variable values when modelling with Matlab itself, is there a recommended way of doing this in simbiology so they can be coupled with values in specific data set columns for fitting? Thanks for any help.