Hp Prime Graphing Wireless Calculator Manual do Utilizador descarregar pdf (Página 36)

32 Geometry

Example:

plotseq(1-x/2, x={3 -1 6}, 5) plots y=x and

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

Implicit Syntax: plotimplicit(Expr, [XIntrvl, YIntrvl])

Plots an implicitly defined curve from Expr (in x and y).

Specifically, plots Expr=0. Note the use of lowercase x and y.

With the optional x-interval and y-interval, this command plots

only within those intervals.

Example:

plotimplicit((x+5)^2+(y+4)^2-1) plots a circle,

centered at the point (-5, -4), with a radius of 1

Slopefield Syntax: plotfield(Expr, [x=X1..X2 y=Y1..Y2],

[Xstep, Ystep], [Option])

Plots the graph of the slopefield for the differential equation

y’=f(x,y) over the given x-range and y-range. If Option is

normalize, the slopefield segments drawn are equal in

length.

Example:

plotfield(x*sin(y), [x=-6..6, y=-

6..6],normalize) draws the slopefield for

y'=x*sin(y), from -6 to 6 in both directions, with

segments that are all of the same length

ODE Syntax: plotode(Expr, [Var1, Var2, ...],

[Val1, Val2. ...])

Draws the solution of the differential equation y’=f(Var1, Var2,

...) that contains as initial condition for the variables Val1,

Val2,... The first argument is the expression f(Var1, Var2,...),

the second argument is the vector of variables, and the third

argument is the vector of initial conditions.

Example:

plotode(x*sin(y), [x,y], [–2, 2]) draws the

graph of the solution to y’=x*sin(y) that passes through

the point (–2, 2) as its initial condition

1 2 ... 31 32 33 34 35 36 37 38 39 40 41 ... 333 334

Sem comentários

Hp Prime Graphing Wireless Calculator Manual do Utilizador Página 36