Texas Instruments TI-89 Manuale Utente

Differential Equation Graphing

414

Selecting the Display Style

With the Style menu, only the

Line

Dot

Square

Thick

Animate

, and

Path

styles are

available.

Dot

and

Square

mark only those discrete values (in

tstep

increments) at which

a differential equation is plotted.

2 ˆ

Setting Graph Formats

The formats affected by differential equations are:

From the Y= Editor, Window Editor, or Graph
screen, press:

— or —

8 Í

Graph format

Description

Graph Order

Not available.

Solution Method

Specifies the method used to solve the differential
equations.

•

RK — Runge-Kutta method. For information about the
algorithm used for this method, refer to the Technical
Reference module.

•

EULER — Euler method.

•

The method lets you choose either greater accuracy or
speed. Typically, RK is more accurate than EULER but
takes longer to find the solution.