[R] Strange behavior of interval values in optimize()

Dieter Menne dieter.menne at menne-biomed.de
Mon Sep 6 15:18:16 CEST 2010



Michael Bernsteiner wrote:
> 
> 
> I'm using optimize() to find the minimum of the following function f, and
> minimize it (without 
> .....
> But, when I choose a larger Interval in the optimization method:
> ....
> The result gets worse (even though the old interval is included in the new
> one).
> 
> In fact I don't want any restrictons for the interval values (something
> like interval=(-Inf, Inf) or at least the interval should be as large as
> possible.
> 
> 

The most likely cause is a second minimum.

Dieter

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