Texas Instruments TINSPIRE

Graphs & Geometry 483
Error Tolerance
Computational accuracy for Runge-Kutta
solution method only. Must be a floating-
point value |1×10
-14
. To restore the default,
select the down-arrow and select
Default.
Field
None
- No field is plotted. Available for any
number of ODEs, but required if three or
more 1st-order ODEs are active. Graphs a
combination of the solution and/or values of
one or more ODEs (according to user-
configured
Axes settings).
Slope - Plots a field representing the family of
solutions to a single 1st-order ODE. Exactly
one ODE must be active. Sets
Axes to Default
(x and y)
. Sets Horizontal axis to x (the
independent variable). Sets Vertical axis to y
(the solution to the ODE).
Direction - Graphs a field in the phase plane
representing the relationship between a
solution and/or values of a system of two
1st-order ODEs (as specified by the
Custom
Axes setting). Exactly two ODEs must be
active. Axes: user-configured (neither axis can
be x).
Axes
Default (x and y)
- Plots x on the x axis and y
(the solutions to the active differential
equations) on the y axis.
Custom - lets you select the values to be
plotted on the x and y axes respectively. Valid
entries include:
• x (the independent variable)
•
y1, y2, and any identifiers defined in the
ODE editor
• y1’, y2’, and any derivatives defined in
the ODE editor
Plot Start
Sets the independent variable value at which
the solution plot starts .
Plot End
Sets the independent variable value at which
the solution plot stops.
Plot Step
Sets the increment of the independent
variable at which values are plotted.