HP Prime Graphing Wireless Calculator Instrukcja Użytkownika Pobierz pdf (Strona 433)

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Chebyshev Tn

Given an integer n, returns the Tchebyshev polynomial (of the rst kind) of degree n.

tchebyshev1(Integer)

Example:

tchebyshev1(3) gives 4*x^3-3*x

Chebyshev Un

Given an integer n, returns the Tchebyshev polynomial (of the second kind) of degree n.

tchebyshev2(Integer)

Example:

tchebyshev2(3) gives 8*x^3-4*x

Plot

Function

Used to dene a function graph in the Symbolic view of the Geometry app. Plots the graph of an expression

written in terms of the independent variable x. Note that the variable is lowercase.

plotfunc(Expr)

Example:

plotfunc(3*sin(x)) draws the graph of y=3*sin(x)

Contour

Used to dene a contour graph in the Symbolic view of the Geometry app. Given an expression in x and y, as

well as a list of variables and a list of values, plots the contour graph of the surface z=f(x,y). Specically, plots

the contour lines z1, z2, and so on, dened by the list of values. You can also specify step-values for both x

and y.

plotcontour(Expr, [ListVars], [ListVals], [xstep=val1], [ystep=val2])

Example:

plotcontour(x^2+2*y^2-2, {x, y}, {2, 4, 6}) draws the three contour lines of

z=x^2+2*y^2–2 for z=2, z=4, and z=6.

App menu

Press to open the Toolbox menus (one of which is the App menu). App functions are used in HP apps

to perform common calculations. For example, in the Function app, the Plot view Fcn menu has a function

called SLOPE that calculates the slope of a given function at a given point. The SLOPE function can also be

used from the Home view or a program to give the same results. The app functions described in this section

are grouped by app.

App menu 385

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