— Function File: sysupdate (sys, opt)

Update the internal representation of a system.

Inputs

sys:

system data structure

opt

string:

"tf"

update transfer function form

"zp"

update zero-pole form

"ss"

update state space form

"all"

all of the above

Outputs

retsys

Contains union of data in sys and requested data. If requested data in sys is already up to date then retsys=sys.

Conversion to tf or zp exits with an error if the system is mixed continuous/digital.

See also: tf, ss, zp, sysout, sys2ss, sys2tf, sys2zp