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MathGroup Archive 1997

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Not a machine-size real number?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg9260] Not a machine-size real number?
  • From: sorrodp at ece.WPI.EDU (Pedro Soria-Rodriguez)
  • Date: Fri, 24 Oct 1997 01:01:15 -0400
  • Organization: Worcester Polytechnic Institute
  • Sender: owner-wri-mathgroup at wolfram.com

Hello, I am trying to do the following in Mahtematica 3.0.0 for Linux

BB[I_,a_,NN,d_,z_]= (I*NN/(2*d))*(z/Sqrt[a^2+z^2])
Plot[BB[1,0.05,100,0.01,z],{z,-1,1}]

Instead of getting the plot, I get the following error message:

Plot::"plnr":
BB[1,0.05,100,0.01,z] ] is not a machine-size real  number at z = -1 ..

Plot::"plnr":
BB[1,0.05,100,0.01,z] ] is not a machine-size real  number at z =
-0.918866

Plot::"plnr":
BB[1,0.05,100,0.01,z] ] is not a machine-size real  number at z =
-0.830382 ..

General::"stop":
Further output of Plot::"plnr" will be suppressed during this 
  calculation.

---------------------------------------------------

What does this mean?  Is the definition of my function incorrect?  
Thank you very much in advance

-- 

--
Pedro Soria-Rodriguez
sorrodp at ece.wpi.edu


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