Re: gnuplot numerical errors on Intel MacBook

[CM <mon...@gm...>]

On 9/24/06, Ethan A Merritt <merritt@u.washington.edu> wrote:
>
> On Saturday 23 September 2006 11:12 pm, CM wrote:
> > Also please look in the file config.h created while preparing
> > > the cvs distribution and tell us whether HAVE_LGAMMA is defined or
> > > commented out.
> >
> > HAVE_LGAMMA is defined to be 1, not commented out.
>
> Hmm. Well, you can probably get a working gamma function by
> replacing this line with
>   #undef HAVE_LGAMMA
>   #undef HAVE_GAMMA
> and then rebuilding the program. (Do not re-run ./configure)


 Yay!  It *mostly* works, now.  It seems to be plotting the right function,
but emits the error message:

lngamma singularity error

Unfortunately, that won't help us figure out what is
> going wrong with the normal configure+build process.
>
> I've CC'ed this to Per Persson, who is our Mac expert.
> This is a PPC MacBook?


No, it's an Intel machine.  (As far as I know, it is universally true that
PowerBook == PPC and MacBook == Intel).

Let me know what I can do to help.


> Has anyone seen numerical errors on the MacBook line of computers?  I have
> > tried both gnuplot 4.0 and 4.1 (compiled from source, not the mac
> package),
> > and in each case the result of
>
> > plot gamma(x)
>
> > is very, very wrong.  Has anyone else seen this?  I searched the
> archives
> > for this list and didn't see anything relevant.
>
>
>
> --
> Ethan A Merritt
> Biomolecular Structure Center
> University of Washington, Seattle 98195-7742
>



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