Texas Instruments TI-89 Titanium User Manual page 406

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Variable
Description
tplot
First t value plotted. If this is not a tstep increment, plotting
begins at the next tstep increment. In some situations, the
first points evaluated and plotted starting at t0 may not be
interesting visually. By setting tplot greater than t0, you can
start the plot at the interesting area, which speeds up the
graphing time and avoids unnecessary clutter on the Graph
screen.
If
,
Note:
tmax < t0
assumed to be the same as
Variable
Description
xmin, xmax,
Boundaries of the viewing window.
ymin, ymax
xscl, yscl
Distance between tick marks on the x and y axes.
ncurves
Number of solution curves (0 through 10) that will be
drawn automatically if you do not specify an initial
condition. By default, ncurves = 0.
Differential Equation Graphing
must be negative. If
tstep
.
t0
,
Fields=SLPFLD
tplot
is ignored and is
403

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