Re: problems with NMinimize

*To*: mathgroup at smc.vnet.net*Subject*: [mg109413] Re: problems with NMinimize*From*: Anh Ngoc LAI <laianhngoc at yahoo.com>*Date*: Mon, 26 Apr 2010 04:50:28 -0400 (EDT)

Hi, One way to solve this problem (if i understand your problem) is to define your function so that only evaluates when its argument is numeric, as follow: f(a_?NumericQ,b_?NumericQ, ...) == ... LAI. --- On Sun, 4/25/10, Alexey Popkov <lehin.p at gmail.com> wrote: From: Alexey Popkov <lehin.p at gmail.com> Subject: [mg109413] [mg109405] Re: problems with NMinimize To: mathgroup at smc.vnet.net Date: Sunday, April 25, 2010, 6:25 AM "Ingolf Dahl" <ingolf.dahl at physics.gu.se> =D1=81=D0=BE=D0=BE=D0=B1=D1=89=D0= =B8=D0=BB/=D1=81=D0=BE=D0=BE=D0=B1=D1=89=D0=B8=D0=BB=D0=B0 =D0=B2 =D0=BD=D0= =BE=D0=B2=D0=BE=D1=81=D1=82=D1=8F=D1=85 =D1=81=D0=BB=D0=B5=D0=B4=D1=83=D1=8E=D1=89=D0=B5=D0=B5: news:hqu8ai$rol$1@s= mc.vnet.net... > Is there any serious Mathematica user in this forum, which has not > stumbled > on this problem one or several times, when NMinimize, or some other > function, tries to evaluate a numeric function symbolically first, before > inserting the numbers? Sometimes it would be nice to have an option, > SymbolicEvaluation->False, which could be set for NMinimize in these > cases. > It is not always so convenient to have to define an extra function just to > take care of this. I think there is a whole group of commands acting > similarly to NMinimize. > > Ingolf Dahl > Sweden I totally agree with you. I do not see anything reasonable in that obviously numerical function (for example, NMinimize, FindMinimum, etc.) is trying for some reason to perform symbolic computation.

**Follow-Ups**:**Re: problems with NMinimize***From:*Ingolf Dahl <ingolf.dahl@telia.com>