[Octave-bug-tracker] [bug #50457] The function ellip(..., "s") results in error.

[anonymous]

URL:
  <http://savannah.gnu.org/bugs/?50457>

                 Summary: The function ellip(...,"s") results in error.
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Sat 04 Mar 2017 01:37:42 PM UTC
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Unexpected Error
                  Status: None
             Assigned to: None
         Originator Name: Giuliano Gasparini
        Originator Email: address@hidden
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.2.1
        Operating System: Any

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Details:

When using argument "s", the function must not work with normalized
frequencies, but with real radians/s.

The "sister" functions 
- butt(...,"s")
- cheby1(...,"s")
- cheby2(...,"s")
work properly.


Testcase:

tWp =   1
tGp =  -1
tWr =   2
tGr = -34
F   = 10000000000000000
[n,Wn]  = ellipord(tWp/F, tWr/F, -tGp, -tGr)
Wn     *= F
[z,p,k] = ellip(n, -tGr, Wn, 's')

results in:
error: ellip: all elements of W must be in the range [0,1]

This message just makes sense in the absence of 's' parameter.





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