Specifications

16 Function Reference
16-4
Table 16-2: 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 LTI 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
Display the number of model/array dimensions
size
Display output/input/array dimensions
Table 16-3: 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 delays in discrete-time models or FRD
models
frd
Convert to a frequency response data model