[Octave-bug-tracker] [bug #57475] svds returns unusual error

[CH]

URL:
  <https://savannah.gnu.org/bugs/?57475>

                 Summary: svds returns unusual error
                 Project: GNU Octave
            Submitted by: atcl
            Submitted on: Wed 25 Dec 2019 10:12:57 AM UTC
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Missed Error or Warning
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 5.1.0
        Operating System: Any

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Details:

Calling svds on NaN matrix requesting a set number of singular values less
than largest dimension of the argument matrix returns:


svds(nan*ones(3),2)
DLASCL: parameter number 4 is invalid
error: Fortran procedure terminated by call to XERBLA
error: called from
    eigs at line 285 column 20
    svds at line 187 column 9



while requesting all singular values gives:


svds(nan*ones(3),3)
error: eig: EIG: matrix contains Inf or NaN values
error: called from
    eigs at line 277 column 22
    svds at line 187 column 9


Does the first error messagee need to be fixed?

Best





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