HP Prime Graphing NW280AAABA App menu, PlotodeExpr, Var1, Var2, X0, Y0, PlotlistX1, Y1, X2, Y2, …

ODE Used in the Symbolic view of the Geometry app. Draws the solution of the differential equation y’=f(x,y) that contains as initial condition the point (x0, y0). The first argument is the expression f(x,y), the second argument is the vector of variables (abscissa must be listed first), and the third argument is the initial condition {x0, y0}.

plotode(Expr, {Var1, Var2}, {X0, Y0})

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 an initial condition.

List Used in the Symbolic view of the Geometry app, this command plots a set of points and connects them with segments. Each point is defined by a vector.

plotlist([X1, Y1], [X2, Y2], …))

Example:

plotlist([0, 0], [2,2], [4,0]) connects the points (0, 0), (2, 2), and (4, 0), in order, with straight line segments.

App menu

Press Dto 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.

Functions and commands 347