Texas Instruments TITANIUM TI-89 - Manual (Page 433)

Differential Equation Graphing 433
6. Press:
,
9
— or —
@ 8 ÍSet
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