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Re: Question in ParametricPlot

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  • Subject: [mg236] Re: [mg227] Question in ParametricPlot
  • From: twj (Tom Wickham-Jones)
  • Date: Mon, 28 Nov 1994 08:30:55 -0600

 Xah Lee writes...

>Here is a problem I have that calls for knowing the internal  

>used for ParametricPlot. When we do a ParametricPlot, mma  

>figures out which t to use to produce a smooth curve. I need the  
list of 

>t(s) used. Is there a way to get them?

One simple way to get the points that are used in Plot is to save  
as the function is evaluated.

pts = {}

Plot[ AppendTo[ pts, t]; Sin[t], {t,0,2}]

for Plot.  Or 

pts = {}

ParametricPlot[ AppendTo[ pts, t]; {Sin[t], Cos[t]},{t,0,2Pi}]

After either of these pts contains the points that were evaluated by
the Plot command.

Tom Wickham-Jones

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