SystemsModelDimensions

SystemsModelDimensions[sys]
gives the number of inputs and outputs of a StateSpaceModel or TransferFunctionModel object sys.

A transfer-function model with three inputs and two outputs:

A state-space model with three inputs and two outputs:

A transfer-function model with three inputs and two outputs:

Out[1]=

Out[2]=

A state-space model with three inputs and two outputs:

Out[1]=

Out[2]=

Keep track of the number of inputs and outputs during model manipulations:

Count the number of inputs and outputs while connecting models:

Connect the two outputs of

to the two inputs of

The resulting system has two inputs and one output:

Merge the first input of

and the second input of

The resulting system has three inputs and three outputs: