Mathematica 9 is now available
Services & Resources / Wolfram Forums
-----
 /
MathGroup Archive
1994
*January
*February
*March
*April
*May
*June
*July
*October
*November
*December
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 1994

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

Search the Archive

Question in ParametricPlot

  • To: mathgroup at christensen.cybernetics.net
  • Subject: [mg227] Question in ParametricPlot
  • From: Xah Y Lee <xyl10060 at fhda.edu>
  • Date: Wed, 23 Nov 1994 03:12:33 -0800 (PST)

Here is a problem I have that calls for knowing the internal algorithm 
used for ParametricPlot. When we do a ParametricPlot, mma automatically 
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?

I know I can get a list of points {{x[t1],y[t1]}, {x[t2], y[t2]},...} by 

 someplot = ParametricPlot[....];

 Cases[ someplot, _Line,Infinity ] [[1]]

and solve for t, but this would be very inpractical. I am writing a 
series of animation generating functions on special plane curves. With 
the list of t, I can be much flexible and powerful in writing my 
programs. What I want is to have mma figure out the t(s) needed to make a 
smooth curve then pass them to my ploting program.

Thanks for any help.

 Xah Lee
 Permament email: 74631.731 at compuserve.com
 good till December 10: xyl10060 at tiptoe.fhda.com
 Phone: 415-965-1454
 Mountain View, CA 






  • Prev by Date: Re: Mathematica materials for Chemistry
  • Next by Date: RE: Negative Area: Definitive Answer (not)
  • Previous by thread: How to use VectorAnalysis package?
  • Next by thread: Re: Question in ParametricPlot