MaplePrimes - answers and comments on Question, parametic plots -- circles

Implicit versus parametric

Robert Israel — Sun, 04 May 2008 10:40:04 Z

(x-1)^2 + y^2 = 1 is an implicit equation, i.e. an equation involving the variables x and y, but not in the form y = (function of x). A parametric equation would make x and y functions of a parameter (let's say x = f(t) and y = g(t)), so that as t varies over some interval [a,b] the point (f(t),g(t)) traverses the curve. The parametric plot command might then be of the form

> plot([f(t), g(t), t = a .. b]);

The simplest parametric form for a circle uses the central angle as parameter.
Is that enough of a hint?

Sorry, but I still don't

alla — Sun, 04 May 2008 10:50:19 Z

Sorry, but I still don't have the answer to my question. Would someone kindly give me the actual syntax that works. Then I can figure out for myself why it works.

Alla

Actual syntax

Robert Israel — Sun, 04 May 2008 11:28:24 Z

> plot([1+cos(t), sin(t), t=0..2*Pi]);

Actual syntax fine

alla — Sun, 04 May 2008 12:24:25 Z

Many thanks.

Alla