Can I set simbiology repeat assignment rule state to active or inactive using variants?

Question

Jim Bosley 2018-3-29

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https://ww2.mathworks.cn/matlabcentral/answers/391461-can-i-set-simbiology-repeat-assignment-rule-state-to-active-or-inactive-using-variants

回答： Arthur Goldsipe 2018-3-30

Using the paradigm similar to that in Dr. Goldspie's insulindemo example, I'm using two rules to set a variable parameter. Let's call the parameter "state_used". In the model, an ODE is used to calculate the species "ODE_state". And I have a function of time calculated to generate "forced_state". One rule sets "state_used" to "ODE_state". The other sets "state_used" to "forced_state". By setting one (and only one) or the other, I can have the model generate the state values, or I can force the state values. For all calculations, the model uses "state_used".

Can I have a variant set a repeat assignment rule to active or inactive?

Or, must I use a MATLAB script to "set" the .Active property to 0 or 1?

An alternate approach would be to have a single assignment rule "ODE_switch" such that

state_used = ODE_switch*ODE_state + (1-ODE_switch)*forced_state

in which case the ODE_switch parameter could be set via variants.

Thanks.

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Answer 1

Arthur Goldsipe 2018-3-30

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You cannot currently use variants to set the Active property of a Rule (or any other object). I agree this is an obvious extension to variants, and we've heard about similar use cases before. Until SimBiology gets such functionality, I recommend either of the alternatives you've already mentioned: setting Active via a script or recasting the rule into something that can be controlled via a variant.