Texas Instruments TI-89 사용자 설명서

Differential Equation Graphing

 452

If You Use the Table Screen to View Differential Equations

If You Use the Table Screen to View Differential Equations

If You Use the Table Screen to View Differential Equations

If You Use the Table Screen to View Differential Equations

You can use the Table screen to view the points for a differential equation graph. 
However, the table may show different equations than those graphed. The table shows 
only the selected equations, regardless of whether those equations will be plotted with 
your current 

 and 

 settings

With custom 
axes

If X Axis is not t, you must enter at least one initial condition 
for each equation in the Y= Editor (whether the equation is 
selected or not).
Otherwise, a Diff Eq setup error occurs when you graph.

In the Graph 
screen

If no curve is graphed, set an initial condition.  If you did enter 
initial conditions in the Y= Editor, select ZoomFit: 

@

„ j

A 1st-order equation may look different with FLDOFF than 
with SLPFLD. This is because FLDOFF uses the tplot and 
tmax Window variables (page 9), which are ignored with 
SLPFLD.

Notes

For 1st-order equations, use FLDOFF and Axes = Custom to 
plot axes that are not possible with SLPFLD. For example, 
you can plot t vs. y1' (where SLPFLD plots t vs. y1). If you 
enter mulNotele 1st-order equations, you can plot one 
equation or its solution vs. another by specifying them as the 
axes.