HP Prime Graphing NW280AAABA PlotparamfVar+i*gVar, Var= Interval, PlotpolarExpr,Var=Interval

plotparam Used in the Geometry app Symbolic view. Takes a complex expression in one variable and an interval for that variable as arguments. Interprets the complex expression f(t)+i*g(t) as x=f(t) and y=g(t) and plots the parametric equation over the interval specified in the second argument.

plotparam(f(Var)+i*g(Var), Var= Interval)

Example:

plotparam(cos(t)+i*sin(t), t=0..2*π) plots the unit circle

plotpolar Used in the Geometry app Symbolic view. Takes an expression in one variable f(x), and an interval for that variable as arguments. Draws the polar plot r=f(x) for x in the interval specified.

plotpolar(Expr,Var=Interval)

Example:

plotpolar((π/2)x, x=-π..π) plots a partial spiral

plotseq Used in the Geometry app Symbolic view. Given an expression in x and a vector containing three values, draws the line y=x, the plot of the function defined by the expression over the domain defined by the interval between the last two values, and draws the cobweb plot for the first n terms of the sequence defined recursively by the expression (starting at the first value).

plotseq(f(Var), Var=[Start, Xmin, Xmax], Integern)

Example:

plotseq(1-x/2, x=[3 -1 6], 5) plots y=x, y=1–x/2 (from x=–1 to x=6), then draws the first 5 terms of the cobweb plot for u(n)=1-(u(n–1)/2, starting at u(0)=3

polar_point Given the radius and angle of a point in polar form, returns the point with rectangular coordinates in complex form.

polar_point(Radius, Angle)

Example:

polar_point(2, π/3) returns point	⎛	2	⋅	⎛ 1	+	i ⋅	3⎞⎞
	⎝			⎝ 2		2	⎠⎠
				---		-------------

Functions and commands 405