Skip to content

Incorrect initialization of LDWORK in sb03md #165

@artpelling

Description

@artpelling

According to the SLICOT documentation for LDWORK of SB03MD:

 LDWORK  INTEGER
          The length of the array DWORK.  LDWORK >= 1, and
          If JOB = 'X' then
             If FACT = 'F', LDWORK >= N*N,           for DICO = 'C';
                            LDWORK >= MAX(N*N, 2*N), for DICO = 'D';
             If FACT = 'N', LDWORK >= MAX(N*N, 3*N).
          If JOB = 'S' or JOB = 'B' then
             If FACT = 'F', LDWORK >= 2*N*N,       for DICO = 'C';
                            LDWORK >= 2*N*N + 2*N, for DICO = 'D'.
             If FACT = 'N', LDWORK >= MAX(2*N*N, 3*N), DICO = 'C';
                            LDWORK >= 2*N*N + 2*N, for DICO = 'D'.
          For optimum performance LDWORK should be larger.
[...]

However, LDWORK is set to

Slycot/slycot/synthesis.py

Lines 790 to 791 in 063fed3

if ldwork is None:
ldwork = max(2*n*n, 3*n)

disregarding the values of JOB, FACT and DICO.

Which gives me

slycot.exceptions.SlycotParameterError: The following argument had an illegal value: ldwork

for JOB='B', FACT='N' and DICO='D'

I know that I can set ldwork manually, but IMHO that sort of thing is precisely what the wrapper should do for me :^)

Metadata

Metadata

Assignees

No one assigned

    Labels

    No labels
    No labels

    Type

    No type

    Projects

    No projects

    Milestone

    No milestone

    Relationships

    None yet

    Development

    No branches or pull requests

    Issue actions