Query outputs

Structure of output table 'sim_out'

One table column is created for every stock in the Vensim model. Also delays are interpreted as stocks by translator resources implemented in PySD (Houghton & Siegel, 2015). This means delays are written as results to ‘sim_out’ just like ordinary stocks.

If a SDL is involved in the simulation, one row of type array (PostgreSQL type ‘real[]’) is created for every instance of a simulation run. The array index corresponds to the time step of the simulation (see Fig. 4, Left).

Fig. 4. Left: Output table, SDL involved; Right: Output table, TSL only

If only TSL are used in a simulation, one dataset row (of PostgreSQL type ‘numeric’) is created for every time step in the simulation (Fig. 4, Right).