Calculator User Manual

3D Graphing 379

xmin, xmax,

ymin, ymax,

zmin, zmax

Boundaries of the viewing cube.

xgrid, ygrid The distance between xmin and xmax and between ymin

and ymax is divided into the specified number of grids. The

z(x,y) equation is evaluated at each grid point where the

grid lines (or grid wires) intersect.

The incremental value along x and y is calculated as:

x increment =

y increment =

The number of grid wires is xgrid + 1 and ygrid + 1. For

example, when xgrid = 14 and ygrid = 14, the xy grid

consists of 225 (15 × 15) grid points.

ncontour The number of contours evenly distributed along the

displayed range of z values.

Variable Description

xmax xmin–

xgrid

---------------------------------

ymax ymin–

ygrid

---------------------------------

(

xmin,ymax

)

z(xmin,ymin)

z(xmax,ymin)

z(xmax,ymax)