User`s guide

11 Reference
11-4
Table 11-2: Model Characteristics
Function Name Description
class
Display model type ('tf', 'zpk', 'ss', or 'frd').
hasdelay
Test true if LTI model has any type of delay.
isa
Test true if LT I model is of specified type.
isct
Test true for continuous-time models.
isdt
Test true for discrete-time models.
isempty
Test true for empty LTI models.
isproper
Test true for proper LTI models .
issiso
Test true for SISO models.
ndims
Get the number of model/array dimensions.
size
Get o utput/input/array dimensions or model order.
Table 11-3: Model Conversion
Function Name Description
c2d
Convert from continuous- to discrete-time models.
chgunits
Convert the units property for FRD models.
d2c
Convert from discrete- to continuous-time models.
d2d
Resample discrete-time models.
delay2z
Convert de lays in dis crete-time mo dels or FRD
models.
frd
Convert to a frequency response d ata model.
pade
Compute the Padé approximation of delays.
reshape
Change the shape o f an LT I array