Why do I receive an error when using the calling syntax stated in the documentation for FDESIGN.NYQUIST in Filter Desisgn Toolbox 3.2 (R14SP2)?

I receive an error when using the syntax in the documentation for FDESIGN.NYQUIST in Filter Desisgn Toolbox 3.2 (R14SP2).

In the documentation for FDESIGN.NYQUIST, the following syntaxes are given:

d = fdesign.nyquist

d = fdesign.nyquist(spectype)

d = fdesign.nyquist(spectype,specvalue1,specvalue2, ...)

d = fdesign.nyquist('tw,ast')

d = fdesign.nyquist(...,fs)

d = fdesign.nyquist(...,magunits)

The first syntax in this list works, but the remaining ones give the following error or a similar one:

 >> d = fdesign.nyquist('tw,ast')

 ??? Error using ==> fdesign.nyquist.nyquist

 The first input to fdesign.nyquist must be a scalar number.

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 an error in the documentation for FDESIGN.NYQUIST in the Filter Design Toolbox. The documentation should read as follows:

d = fdesign.nyquist

d = fdesign.nyquist(l, spectype)

d = fdesign.nyquist(l, spectype,specvalue1,specvalue2, ...)

d = fdesign.nyquist(l, 'tw,ast')

d = fdesign.nyquist(...,fs)

d = fdesign.nyquist(...,magunits)

where l is the Band.