fminunc with a one-variable function

[Jaroslav Hajek]

On Fri, Jul 24, 2009 at 7:34 PM, Jonathan Stickel<jjstickel at vcn.com> wrote:
>
>
> Jaroslav Hajek wrote:
>>
>> On Thu, Jul 23, 2009 at 5:32 PM, Jonathan Stickel<jjstickel at vcn.com>
>> wrote:
>>>
>>> I see the following when I use fminunc to minimize a function of just one
>>> variable:
>>>
>>>  function F = theF(x)
>>>  F = x.^2 + exp(x);
>>>  endfunction
>>>  x0 = 1;
>>>  [xmin,fmin] = fminunc(@theF,x0)
>>>
>>> error: Invalid call to cholupdate.  Correct usage is:
>>>
>>>  -- Loadable Function: [R1, INFO] = cholupdate (R, U, OP)
>>>
>>>
>>> I know that there are other minimization functions that can be used for
>>> single-variable functions, but fminunc should work too.
>>>
>>> Thanks,
>>> Jonathan
>>>
>>
>> Please try
>> http://hg.savannah.gnu.org/hgweb/octave/rev/5fcf008c7c41
>>
>
> OK, I managed to compile chol.cc (thanks to jwe) from the indicated
> changeset and put it in my path:
>
> octave:6> which chol
> `chol' is a function from the file
> /Users/jstickel/programming/octave/local/chol.oct
>
> However, I still see the same error as reported above.
>

Of course you do. The error was in cholupdate et al., so you need also
to override the autoloads. Or just replace the chol.oct file in
Octave's directory.


-- 
RNDr. Jaroslav Hajek
computing expert & GNU Octave developer
Aeronautical Research and Test Institute (VZLU)
Prague, Czech Republic
url: www.highegg.matfyz.cz