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 Author Comment/Response Po-Heng Chen 09/29/98 07:26am I am having difficulty plotting parametric functions substituting only one variable: Parametric function 1 is defined as follows: \!\(\(f\_1[t_, s_] = {t\ Cos[s], t, t\ Sin[s]}; \)\) I would like to parametrically plot function 1 for t=0..Pi at s=0,Pi/4,Pi/2,Pi. This is the command I've been using: \!\(ParametricPlot3D[{f\_1[t, 0], f\_1[t, Pi/4], f\_1[t, Pi/2], f\_1[t, Pi]}, {t, 0, 2 Pi}, AspectRatio -> 1]\) But the error messages say: \!\(ParametricPlot3D::''pplr'' \( : \ \) ''\!\({\(f\_1[\(t, 0\)]\), \(f\_1[\(t, \\[Pi]\/4\)]\), \(f\_1[\(t, \ \\[Pi]\/2\)]\), \(f\_1[\(t, \\[Pi]\)]\)}\) is not a list starting with three \ real numbers at \!\(t\) = \!\(0.`\).''\) \!\(ParametricPlot3D::''pplr'' \( : \ \) ''\!\({\(f\_1[\(t, 0\)]\), \(f\_1[\(t, \\[Pi]\/4\)]\), \(f\_1[\(t, \ \\[Pi]\/2\)]\), \(f\_1[\(t, \\[Pi]\)]\)}\) is not a list starting with three \ real numbers at \!\(t\) = \!\(0.0849079095564808916`\).''\) \!\(ParametricPlot3D::''pplr'' \( : \ \) ''\!\({\(f\_1[\(t, 0\)]\), \(f\_1[\(t, \\[Pi]\/4\)]\), \(f\_1[\(t, \ \\[Pi]\/2\)]\), \(f\_1[\(t, \\[Pi]\)]\)}\) is not a list starting with three \ real numbers at \!\(t\) = \!\(0.169815819112961774`\).''\) General::''stop'': ''Further output of \!\(ParametricPlot3D :: \''pplr\''\) will be suppressed \ during this calculation.'' ParametricPlot3D::''ppx'': ''Graphics3D object calculated in ParametricPlot3D is empty.'' Out[14]= \!\(ParametricPlot3D[{f\_1[t, 0], f\_1[t, \[Pi]\/4], f\_1[t, \[Pi]\/2], f\_1[t, \[Pi]]}, {t, 0, 2\ \[Pi]}, AspectRatio \[Rule] 1]\) What am I doing wrong here? Thanks. URL: ,

 Subject (listing for 'ParametricPlot3D of Functions') Author Date Posted ParametricPlot3D of Functions Po-Heng Chen 09/29/98 07:26am Re: ParametricPlot3D of Functions JC 10/01/98 2:40pm Re: ParametricPlot3D of Functions hsn 10/01/98 2:41pm
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