Texas Instruments TI-89 Voyage 200, User Manual

Page: 433 / 1008

Differential Equation Graphing 433
6. Press:
,
9
— or —
@ 8
Í
Set
Axes = ON
,
Labels = ON
,
Solution Method = RK
, and
Fields = FLDOFF
.
Important:
For 3rd- or higher-order
equations, you must set
Fields=FLDOFF
.
Otherwise, an
Undefined variable
error
occurs when graphing.
7. In the Y= Editor, press:
@ 2
‰
Set
Axes = TIME
.
Note:
With
Axes=TIME
, the solution to the
selected equation is plotted against time
(t).
8. In the Window Editor (
8 $
), set
the Window variables.
t0=0
tmax=10
tstep=.1
tplot=0
xmin= L 1
xmax=10
xscl=1.
ymin=
L 3
ymax=3
yscl=1
ncurves=0
diftol=.001