Initialization of a fixed delay
Posted: Tue Jul 15, 2008 4:13 pm
Is there any reasonable way to initialize a "DELAY FIXED" variable to an arbitrary function of time? Right now it appears that all previous values from 0 thru -Delay Time are just initialized to the third argument, which must be constant. Of course one can drive the simulation up to a given point in time and then start from there, but in my case this would make the simulations many times longer and hence slower, which would make optimization quite painful. It would be less painful to implement long, high-order material delay which approximates a fixed delay (which seems to be how VENSIM does it internally) using subscripts and VECTOR ELM MAP, and then read in the initial values of all the intermediate levels from an Excel sheet or data file, but even that seems a bit much to expect of an average user. So I am wondering if I might have missed something in the documentation?