Displaying 1 result from an estimated 1 matches for "god_the_geometer".
2011 Nov 01
2
drawing ellipses in R
Hello,
I have been following the thread dated Monday, October 9, 2006 when Kamila Naxerova asked a question about plotting elliptical shapes. Can you explain the equations for X and Y. I believe they used the parametric form of x and y (x=r cos(theta), y=r sin(theta). I don't know what r is here ? Can you explain 1)the origin of these equations and 2) what is r?
Sincerely,
Mary A. Marion