MathGroup Archive 2003

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: Problems evaluating Grad


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
> ---------------------------------------------------


  • Prev by Date: Silly Gridbox[] question
  • Next by Date: Re: Problems evaluating Grad
  • Previous by thread: Problems evaluating Grad
  • Next by thread: Re: Problems evaluating Grad