HP Prime Graphing Wireless Calculator - Manual (Page 142)

138 Functions and commands
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)
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.
App menu
Press D 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.