[Rd] (PR#9328) Error in optim(...) non-finite finite-difference

ripley at stats.ox.ac.uk ripley at stats.ox.ac.uk
Wed Nov 1 08:56:33 CET 2006

No, this is not a bug in R, but a report to you by R of a problem with 
your code.  It means that the difference of two values of your function 
evaluated to a non-finite value when doing finite-differencing. 
Non-finite values are Inf, -Inf or NaN.

There is nothing to reproduce here, your version of R is long obsolete and 
you are asking a question.  Please do study the FAQ *before* posting an 
unhelpful non-bug report like this.

On Wed, 1 Nov 2006, avbell at ucdavis.edu wrote:

> Full_Name: Adrian Bell
> Version: 2.2.0
> OS: Windows XP Prof
> Submission from: (NULL) (
> Mysterious error that I do not know how to get around.
> Error in optim(...)
> non-finite finite-difference value
> For me, this has occurred for methods Nelder-Mead and L-BFGS-B.
> What does it mean? Is it a bug? I have tried several things including coercing
> the function being optimized to be finite.
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Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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