Problem with vector definition for PID controller problem

Error says input delay must have same amout of entries as other. Num, den and input delay all have 7 terms ?Where have i made a mistake

Answer 1

[Srivardhan Gadila]

The InputDelay must either be a scalar for a SISO system or a Nu-by-1 vector for multi-input system, where the numerator, denominator is specified as an Ny-by-Nu cell array of row vectors to specify a MIMO transfer function, where Ny is the number of outputs and Nu is the number of inputs.

In this case the value of Ny = 7 and Nu = 1. Hence the size of 'InputDelay' vector cannot can be 7x1.

Refer to the documentation of tf and description of numerator, denominator & InputDelay for more information.