HP 48gII Graphing Calculator Manual do Utilizador descarregar pdf (Página 731)

100

101

Page 22-15

Three-dimensional graphics

The three-dimensional graphics available, namely, options Slopefield,

Wireframe, Y-Slice, Ps-Contour, Gridmap and Pr-Surface, use the VPAR

variable with the following format:

left

, x

right

, y

near

, y

far

, z

low

, z

high

, x

min

, x

max

, y

min

, y

max

, x

eye

, z

eye

, x

step

, y

step

}

These pairs of values of x, y, and z, represent the following:

• Dimensions of the view parallelepiped (x

left

, x

right

, y

near

, y

far

low

, z

high

)

• Range of x and y independent variables (x

min

, x

max

, y

min

, y

max

)

• Location of viewpoint (x

eye

, y

eye

, z

eye

)

• Number of steps in the x- and y-directions (x

step

, y

step

)

Three-dimensional graphics also require the PPAR variable with the

parameters shown above.

The variable EQ

All plots, except those based on ΣDAT, also require that you define the

function or functions to be plotted by storing the expressions or references to

those functions in the variable EQ.

In summary, to produce a plot in a program you need to load EQ, if required.

Then load PPAR, PPAR and ΣPAR, or PPAR and VPAR. Finally, use the name

of the proper plot type: FUNCTION, CONIC, POLAR, PARAMETRIC, TRUTH,

DIFFEQ, BAR, HISTOGRAM, SCATTER, SLOPE, WIREFRAME, YSLICE,

PCONTOUR, GRIDMAP, or PARSURFACE, to produce your plot.

Examples of interactive plots using the PLOT menu

To better understand the way a program works with the PLOT commands and

variables, try the following examples of interactive plots using the PLOT menu.

Example 1 – A function plot:

„ÌC Get PLOT menu (*)

@)PTYPE @FUNCT Select FUNCTION as the plot type

‘√r’ `„ @@EQ@@ Store function ‘√r’ into EQ

1 2 ... 726 727 728 729 730 731 732 733 734 735 736 ... 863 864

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