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Bug or feature?
From: |
John W. Eaton |
Subject: |
Bug or feature? |
Date: |
Mon, 20 Jan 1997 21:38:57 -0600 |
On 20-Jan-1997, Shmuel Tomer <address@hidden> wrote:
: In matlab:
:
: >> [1 2] == [1]
:
: ans =
:
: 1 0
:
: >> [1 2] == []
:
: ans =
:
: 0
:
: but in octave:
:
: octave:1> [1 2] == [1]
: ans =
:
: 1 0
:
: octave:2> [1 2] == []
: error: operator ==: nonconformant arguments (op1 is 1x2, op2 is 0x0)
:
: Is this a bug or a feature?
I think I would call this a bug.
: In other words, would it be correct to reverse the order of the
: following two tests in the macro MX_MX_BOOL_OP (src/ops.h, lines
: 94-100)?
:
: if (m1_nr != m2_nr || m1_nc != m2_nc) \
: { \
: gripe_nonconformant ("operator " op, m1_nr, m1_nc, m2_nr, m2_nc); \
: return Matrix (); \
: } \
: if (m1_nr == 0 || m1_nc == 0) \
: return empty_result; \
:
: Would that have (disastrous) effects, other than to provide a Matlab
: compatible behavior?
I don't think that simply switching the order of the tests is enough
to make this part of Octave compatible with Matlab. I've just posted
a patch to the bug-octave mailing list that might do a better job.
: I don't prefer this behavior per se, but being able to use octave in
: my site may depend on wheter the users need to go through the
: existing zillion scripts and change every occurrence of
:
: if myString == ''
: to
: if strcmp(myString, '')
The patch will also make
myString == ''
work as you expect.
Thanks,
jwe
- Bug or feature?, Shmuel Tomer, 1997/01/20
- Bug or feature?,
John W. Eaton <=