Why does the UCOMPLEX object fail to use its "Mode" method properly in the Robust Control Toolbox 3.0 (R14sp1)?

I have created an uncertain complex parameter in the Robust Control Toolbox. However it doesn't seem to be using its "Mode" method as stated in the documentation. The documentation specifies the following:

 The Mode property determines which description remains invariant if the NominalValue is changed (the other is derived). The default Mode is 'Radius' and the default radius is 1.

However, when the Mode is specified as 'Percentage' and the 'NominalValue' property is changed, the 'Radius' still remains invariant and the 'Percentage' changes to accommodate the 'NominalValue'.

This is demonstrated in the following code:

>> A = ucomplex('a',1+j,'Percentage',70.7)

Uncertain Complex Parameter: Name a, NominalValue 1+1i,  +/- 70.7%

>> A.Radius

ans =

      0.9998

>> A.NominalValue=(1+324*j)/456

Uncertain Complex Parameter: Name a, NominalValue 0.00219+0.711i,  +/- 141%

>> A.Radius

ans =

      0.9998

>> A.Mode

ans =

Percentage

Answer 1

[MathWorks Support Team]

This bug has been fixed in Release 14 Service Pack 3 (R14SP3). For previous product releases, read below for any possible workarounds:

This has been verified as a bug in Robust Control Toolbox 3.0 (R14SP1) in the way that an uncertain complex parameter handles its 'Mode' property.

There are currently no known workarounds.