YVOL

Type:

Command

 

 

Description:

Y Volume Coordinates Command: Sets the depth of the view volume in the reserved variable

 

VPAR.

 

 

 

The variables ynear and yfar are real numbers that set the y-coordinates for the view volume used in

 

3D plots. ynear must be less than yfar. These values are stored in the reserved variable VPAR.

Access:

…µYVOL

 

 

Input/Output:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Level 2/Argument 1

Level 1/Argument 2

Level 1/Item 1

 

 

 

 

 

 

 

 

 

ynear

yfar

→

 

 

 

 

See also:

EYEPT, XVOL, XXRNG, YYRNG, ZVOL

 

 

 

 

 

 

 

YYRNG

Command

 

 

Type:

 

 

Description:

Y Range of an Input Plane (Domain) Command: Specifies the y range of an input plane (domain)

 

for GRIDMAP and PARSURFACE plots.

 

 

The variables yy near and yy far are real numbers that set the y-coordinates for the input plane. These

 

values are stored in the reserved variable VPAR.

 

Access:

…µYYRNG

 

 

Input/Output:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Level 2/Argument 1

Level 1/Argument 2

Level 1/Item 1

 

 

 

 

 

 

 

 

 

ynear

yfar

→

 

 

 

 

See also:

EYEPT, XVOL, XXRNG, YVOL, ZVOL

 

 

 

 

 

 

 

ZEROS

 

 

 

 

 

Type:

Command

 

 

Description:

Returns the zeros of a function of one variable, without multiplicity.

Access:

PSOLVE, Symbolic solve, !ÎL

 

Input:

Level 2/Argument 1: An expression.

 

 

Level 1/Argument 2: The variable to solve for.

 

Output:

The solution, or a list of solutions, for the expression equated to 0.

Flags:

Radians mode must be set (flag –17 set).

 

 

For a symbolic result, clear the CAS modes Numeric option (flag –3 clear).

 

The following flag settings affect the result:

 

 

•

If Exact mode is set (flag –105 is clear), attempts to find exact solutions only. This may return a

 

 

null list, even if approximate solutions exist.

 

 

•

If Approximate mode is set (flag –105 set), finds numeric roots.

 

•

If Complex mode is set (flag –103 set), searches for real and complex roots.

Example:

Find the roots of the following equation in x, without specifying that x=2 is a root twice.

 

x3 – x2 – 8x + 12 = 0:

 

 

Command:

ZEROS(X^3-X^2-8*X+12)

 

 

Results:

{-3, 2}

 

 

 

 

 

 

 

 

 

3-284 Full Command and Function Reference