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Generate Figure 6-8:

tvec=0:(140/99):140;

compare(syscl,sysclr,tvec,{type=7})

f8=plot({keep,legend=["original","reduced"]})

Figure 6-8.  Step Response with ophank

The open-loop gain, closed-loop gain and step response are all inferior to 
those obtained with 

redschur( )

. This emphasizes the point that one 

cannot automatically assume that, because the error bound formula for 

ophank( )

 is more attractive than that for 

redschur( )

, the error itself 

will be better for 

ophank( )

.