Texas Instruments TI-86 - Manual (Page 145)

Chapter 10: Differential Equation Graphing
133
10DIFFEQ.DOC TI-86, Chap 10, US English Bob Fedorisko Revised: 02/13/01 2:28 PM Printed: 02/13/01 3:02 PM Page 133 of 20 10DIFFEQ.DOC TI-86, Chap 10, US English Bob Fedorisko Revised: 02/13/01 2:28 PM Printed: 02/13/01 3:02 PM Page 133 of 20 10DIFFEQ.DOC TI-86, Chap 10, US English Bob Fedorisko Revised: 02/13/01 2:28 PM Printed: 02/13/01 3:02 PM Page 133 of 20
The GRAPH Menu 6
Q'(t)= WIND INITC AXES GRAPH 4 FORMT DRAW ZOOM TRACE EXPLR
4 EVAL STGDB RCGDB STPIC RCPIC
equation initial conditions
editor
editor explore with the free-moving cursor
differential equation axes differential equation
window editor editor format screen
Setting the Graph Format
To display the format screen in DifEq graphing mode,
select FORMT from the GRAPH menu (6 / &).
♦
The RK Euler and SlpFld DirFld FldOff format settings
are available only in DifEq mode.
♦
The RectGC PolarGC , DrawLine DrawDot , and
SeqG SimulG format settings are not available in
DifEq graphing mode.
♦ All other format settings are the same as described in Chapter 5.
Solution Method Format
RK Uses the Runge-Kutta method to solve differential equations more accurately than the
Euler solution method format, but not as fast
Euler Uses the Euler method to solve differential equations; requires a number of iterations
between
tStep values, so EStep= prompt replaces difTol= prompt on the window editor
Chapter 5 describes the
GRAPH
menu item GRAPH.
Chapter 6 describes these
GRAPH
menu items:
DRAW , ZOOM, TRACE,
EVAL , STGDB, RCGDB,
STPIC , and RCPIC.
The TI - 86 retains
independent format settings
for each graphing mode.