Re: [SOSlib-discuss] ODEModel_createWithObservables[Scanned]

[Eric F. <efe...@ph...>]

Hi,

That seems fine for me. However would that affect event evaluation ?

Eric

> -----Original Message-----
> From: Rainer Machne [mailto:ra...@tb...] 
> Sent: 06 October 2008 14:38
> To: sbm...@li...
> Subject: Re: [SOSlib-discuss] ODEModel_createWithObservables[Scanned]
> 
> Hi,
> 
> I think we can get rid of the "observables" all together. I 
> have moved update of all assignment rules - even those which 
> are not required to solve the system - to the two cases were required:
> 
> a) with option StoreResults: all values are stored, so all 
> rules need to be updated anyways
> 
> b) IntegratorInstance_getVariableValue: if an assigned value 
> is requested specifically, then assignment rules are updated 
> (but only once, if the function is used several times at the 
> same integration step!).
> 
> So if you solve without the StoreResults option, and don't 
> use getVariableValue for assigned values (rate laws, values 
> only in the model for observation purposes), the solver will 
> always only update the required rules.
> 
> At a later point also the complete rule evaluation for above 
> cases could be optimized by storing the dependency graph 
> between assignments and use a recursive evaluation through 
> this graph ONLY for the requested values.
> 
> As a conclusion, "observables" to optimize solver performance 
> is not required anymore, and I will remove this functionality 
> completely.
> 
> Any objections?
> 
> Rainer