c2d is used to convert a model from continuous to discrete time. The official doc states:
sysd = c2d(sysc,Ts) discretizes the continuous-time dynamic system model sysc using zero-order hold on the inputs and a sample time of Ts.
Why is it that when I do:
>> c2d(1/s, 1)
ans = 1 ----- z - 1 Sample time: 1 seconds Discrete-time transfer function.
but according to Z-transform tables the z transform of
ans = z ----- z - 1
Why this discrepancy?