Hello,
I'll have to get the data set off Tim that crashes to test further. I
tried this function on one set of data and it didn't crash. And the data
I tested on it would not have been sensibly fitted by this curve because
the data was an ordinary NMR data set and one precondition for this fit to
mean anything is that the y values are all less than 1 (since Ax < 1+Ax).
So it only makes sense to use this for certain types of data. I think
we're going to have to restrict the fitting options dependent on the
context, somehow. (The C code does check, by the way, that 1+Ax is not 0
before dividing. But I guess the nonlinear fitting routine must be
getting into some kind of infinite loop because the fit is not working,
although I don't see how right now.)
Wayne
On Wed, 9 May 2007, Tim Stevens wrote:
> > I'm having the same problem, except that with me analysis crashes
> > immediately when using the Ax/(1+Ax) function - also with a segmentation
> > fault. Could that be an uncaught division by 0 somewhere? ;)
>
> Quite possibly (although not in the Python world, given the errors). As
> in my prev post use the other fit (if appropriate) in the mean time: It is
> better all round and has a more interpretable meaning for binding.
>
> T.
>
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