HP Prime Graphing NW280AAABA manual Plot

Plot

Function Used to define 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)

Implicit Used to define an implicit graph in the Symbolic view of the Geometry app. Plots the graph of an equation written in terms of the independent variable x and the dependent variable y. Note that the variables are lowercase.

plotimplicit(Expr)

Example:

plotimplicit(x^2-2*y^2+3*x*y) plots a rotated

hyperbola

Slopefield Used to define a slopefield graph in the Symbolic view of the Geometry app. Plots the graph of the slopefield for the differential equation y’=f(x,y) over the given x-range and y- range.

plotfield(Expr, x=X1..X2, y=Y1..Y2)

Example:

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

draws the slopefield for y’=x*sin(y) in the square region defined by the x-interval [–6, 6] and the y-interval [–6, 6].

Contour Used to define 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). Specifically, plots the contour lines z1, z2, etc. defined by the list of values.

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.

346 Functions and commands