Søren Hauberg wrote:
> fre, 21 05 2010 kl. 09:53 +0200, skrev Alois Schlögl:
>> Søren Hauberg wrote:
>>> lør, 20 03 2010 kl. 19:36 +0100, skrev Michael Creel:
>>>> I think that replacing list with cell arrays is pretty
>>>> straightforward. I did that for samin and bfgsmin quite a while ago,
>>>> when lists were deprecated. I suggest that the authors of the
>>>> functions in question take care of this before Octave 3.4 appears. If
>>>> they don't, then functions that stop working can be moved to a "deep
>>>> freeze" directory, so that they can be recovered when someone has time
>>>> to work on them.
>>> This is fine by me.
>>>
>>> The following functions seem to be using lists at the moment. Unless
>>> they are fixed by the time Octave 3.4 is released, they will be put in a
>>> directory that is not installed as part of the package.
>>>
>>> d2_min.m
>>> fminunc_compat.m
>>> line_min.m
>>> minimize.m
>>> nelder_mead_min.m
>>> test_d2_min_2.m
>>> test_d2_min_3.m
>>> test_fminunc_1.m
>>> test_min_3.m
>>> test_min_4.m
>>> test_minimize_1.m
>>> test_nelder_mead_min_1.m
>>> deriv.m
>>> optimset_compat.m
>>> __semi_bracket.m
>>>
>>> So, if you care about any of these functions, please speak up.
>>>
>> I've replaced all list elements in optim. According to my tests, these
>> tests work fine:
>> test_d2_min_1 % ok
>> test_d2_min_2 % ok
>> test_d2_min_3 % ok
>> test_nelder_mead_min_2% ok
>> test_wpolyfit % ok
>> test_min_3 % ok
>>
>> I guess, this means that most other functions (like d2_min, line_min,
>> deriv, minimize, nelder_mead_min, and fminunc_compat are also fine. )
>>
>> The following tests are still failing
>> test_min_4 % ffailed
>> test_minimize_1 % failed
>> test_nelder_mead_min_1% failed
>> test_fminunc_1 % failed
>>
>> test_min_4 fails with the following usage error:
>> usage: bfgsmin: 1st element of 3rd argument (iteration limit) must be
>> Inf or positive integer.
>> Perhaps, this test is broken?
>> The other tests fail with a segmentation fault - so there is at least a
>> problem somewhere else, too.
>>
I've investigated the segmentation faults in the functions
test_minimize_1
test_nelder_mead_min_1
test_fminunc_1
and filed a bug report with octave
https://savannah.gnu.org/bugs/index.php?29960
The patch below resolved the seg-fault problem; although, I do not
understand why. Perhaps, this is somehow related to the reported bug.
These 3 tests do not seem to converge but run forever (I stopped after
more than 100 000 iterations). I do not know, whether this is the
intention of these tests or not. Can someone else look at this ?
Index: nelder_mead_min.m
===================================================================
--- nelder_mead_min.m (revision 7343)
+++ nelder_mead_min.m (working copy)
@@ -153,8 +153,7 @@
y = zeros (N+1,1);
for i = 1:N+1,
- aa = {args{1:narg-1},reshape(u(i,:),R,C),args{narg+1:end}};
- y(i) = feval (f, aa{:});
+ y(i) = feval (f, args{1:narg-1},reshape(u(i,:),R,C),args{narg+1:end});
end ;
nev = N+1;
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