Hp 49g Graphing Calculator Manuel d'utilisateur télécharger pdf (Page 89)

Plot window parameters

X-Left, X-Right The a;-axis range—or width—of the view volume.

Y-Near, Y-Far The y-axis range—or depth—of the view volume.

Z-Low, Z-High The z-axis range—or height—of the view volume.

XE The

X coordinate of the eyepoint.

YE The y coordinate of the eyepoint.

ZE The z coordinate of the eyepoint.

Step Indep The number of columns in the sampling grid.

Step Depnd The number of rows in the sampling grid.

Plot setup parameters

Type

Indep

Depnd

The type of plot (in this case, wireframe).

The angle miits field indicates the imits in which angular

arguments are to be interpreted: degrees, radians, or

gradians.

The equation or list of equations you want to plot.

The name of one of the independent variables.

The name of the second independent variable.

Pseudo-Contour plots

A pseudo-contour plot is a lattice of line segments each tangent to a

contour of a fimction (a curve satisfying F(x,y) = constant).

A pseudo-contour plot needs two inputs to generate an output. The

HP 49G uses a two-dimensional .mmpling grid of points whose

coordinates provide the two inputs required. By default, the sampling grid

consist of 80 points: 10 columns by 8 rows. In drawing a pseudo-contour

plot, the HP 49G computes a tangent for each point in tire sampling grid.

The pseudo-contour plot type produces a fast contour plot, enabling your

eye to pick out the integral curves without actually plotting them.

The following example is a pseudo-contour plot of z = y - ry‘ .

Plotting graphs Page 4-21

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Hp 49g Graphing Calculator Manuel d'utilisateur Page 89