Negative double weirdness

[Steve Emsley]

Marcus,

Maybe I'm too close to this to see what's happening:

I upgraded libffi-1.17 to libffi-1.18 while upgrading to v1.2 but I
guess that isn't the cause since v1.1 seems to work OK with the new
version.

                             rad =  6.956807e-01
             pow(trans, airmass) =  4.597215e-01
             0.6956807*0.4597215 =  3.198194e-01
                   rad*0.4597215 =  3.198194e-01 
BUT
         rad*pow(trans, airmass) = -4.597215e-01     WRONG!
WHERE
                           trans =  6.410000e-01
                         airmass =  1.747446e+00
             pow(0.641,1.747446) =  4.597215e-01
   0.6956807*pow(0.641,1.747446) =  3.198194e-01
         rad*pow(0.641,1.747446) =  3.198194e-01
          rad*pow(0.641,airmass) =  3.198194e-01     #1
         rad*pow(trans,1.747446) =  3.198194e-01     #2
AAARGH!
          rad*pow(trans,airmass) = -4.597215e-01     #3 WRONG!

But, pointing SWARMHOME to v1.1
          rad*pow(trans,airmass) =  3.198194e-01     CORRECT

As you can see I've exercised all the options but find myself no
nearer a solution. Will some zen master wack me over the head and
bring me to enlightenment! 

That #1 && #2 are true but #3 is false, if and only if using v1.2,
gives me a headache!

Steve.
-- 
---------------------------------------------------------------------
 Steve Emsley                 Ecosystems Analysis & Management Group
 address@hidden              University of Warwick, England
 http://www.oikos.warwick.ac.uk/~sme/           (+44) (0)1598 753648
---------------------------------------------------------------------

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