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Re: Plot[] problem (plnr) - help !!!


Hi,

look to the difference of SetDelayed[] (sort :=) and Equal[] (short ==)

Hope that helps
  Jens


Alexander Sirotkin wrote:
> 
> Hi.
> 
> I'm trying to do most trivial and simple thing - define
> some function and then Plot[] it. However, I get some very
> weird error - "  ...is not a machine-size real number at ..."
> 
> Here is the code :
> a[0]==1
> a[1]==0.99/50000
> H[w] == 20Log[10,Sum[a[k] Exp[I 2Pi w(-k)], {k,0,1}]]
> Clear[H]
> Plot[H[w], {w, 1, 100}]
> 
> I've seen some articles (even at www.wolfram.com) about that
> problem, but NONE of them proposed a working solution !!!
> 
> Just putting Evaluate[] inside the Plot[] does nothing...


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