System Dynamics Pitfalls and Pointers
Graphing Time-Dependent Variables
We often need to provide graphical inputs into models. Limited
data sets may be depicted conveniently in graphical form, because
this allows the data to be interpolated—the gaps can be
filled by a process which estimates the missing data. Here
the method of creating graphical input to a time-based variable
is explained and demonstrated.
Powersim Studio GRAPH functions are explained. There
are four GRAPH functions. Each of these defines inputs and
possible outputs in a different way. Powersim Studio GRAPH functions
are GRAPH, GRAPHCURVE, GRAPHLINAS and GRAPHSTEP. GRAPH is used as
a representative example to explain and demonstrate how each might
The following is designed to explain how to build
graphical relationships of variables which are time dependent .
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