[D,IsDev] = zerodb(M,Range)
[D,IsDev] = zerodb(M,Range,NCol)
M [ model ] - Model object for which the zero database will be created.
Range [ numeric ] - Intended simulation range; the zero database will be created on a range that also automatically includes all the necessary lags.
NCol [ numeric ] - Number of columns for each variable; the input argument NCol can be only used on models with one parameterisation.
D [ struct ] - Database with a tseries object filled with zeros for each linearised variable, a tseries object filled with ones for each log-linearised variables, and a scalar or vector of the currently assigned values for each model parameter.
IsDev [ true ] - The second output argument is always true, and can be used to set the option 'deviation=' in model/simulate.