Is there an error in the documentation of the IFIR function within Filter Design Toolbox 4.0 (R2006b) ?

If I perform the following steps:

 Open the fdatool

 Change 'Design Method' to 'Interpolated FIR' and click 'Design Filter'.

The resulting filter is linear phase, not minimum phase.

The documentation of the IFIR function states:

" In this syntax, ifir only creates minimum phase filters. "

Answer 1

[MathWorks Support Team]

This bug has been fixed in Release 2007b (R2007b). For previous product releases, read below for any possible workarounds:

There is an error in the documentation of the IFIR function within Filter Design Toolbox 4.0 (R2006b).

The documentation should be read:

 ifir only creates linear phase filters.

instead of:

 ifir only creates minimum phase filters.