Re: Problems evaluating Grad

*To*: mathgroup at smc.vnet.net*Subject*: [mg39420] Re: [mg39372] Problems evaluating Grad*From*: Kirk Reinholtz <kirk.reinholtz at jpl.nasa.gov>*Date*: Fri, 14 Feb 2003 03:23:54 -0500 (EST)*References*: <200302130952.EAA20607@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

I'll take a wild guess here: Perhaps you accidently defined a symbol of some sort that broke Grad somehow. Perhaps you've got a Grad you accidently defined in there someplace, or you broke or redefined f[] or ...? Konrad Den Ende wrote: > > I'd like to detrmine Grad to a function so i go: > <<Calculus`VectorAnalysis` > f[x_,y_]:=x+y > > Grad[f[a,b]] > > I get no errors, but the answer is simply the same thing > that i asked, as if no computation was done. What do i > do wrong? > > Also - when i evaluated the examples in Help i got the same > behavior. The answer that already is there gets exchanged > to something else upon my evaluation. Namely, the question > itself. What is that?! > > -- > > Vänligen > Konrad > --------------------------------------------------- > phone #1: (+46/0) 708 - 70 73 92 > phone #2: (+46/0) 704 - 79 96 95 > url: http://konrads.webbsida.com > e-mail: chamsterkonrad at bigfoot.com > ----------------------------------- > > Sleep - thing used by ineffective people > as a substitute for coffee > > Ambition - a poor excuse for not having > enough sence to be lazy > ---------------------------------------------------

**References**:**Problems evaluating Grad***From:*"Konrad Den Ende" <chamsterkonrad@bigfoot.com>