RPL Programming Examples 2-33
TSA (Animating Taylor's Polynomials)
TSA displays in succession each graphics object created in SETTS.
Techniques used in TSA
! Passing a global variable. Because SETTS takes several minutes to execute, TSA does not call SETTS.
Instead, you must first execute SETTS to create the global variable TSL containing the list of graphics objects.
TSA simply executes that global variable to put the list on the stack.
! ANIMATE. TSA uses the ANIMATE command to display in succession each graphics object from the list.
TSA program listing
Program: Comments:
"!
:DE!LS_#!
Puts the list TSL on the stack
and converts it to 10 graphics
objects and the list count.
f!f!g8!g8!h!dQ!8!h!'!
Set up the parameters for
ANIMATE.
B=6MB:<!
Displays the graphics in
succession.
33!4KL2=!
Removes the graphics objects
and list count from the stack.
1!
`OTSA K
Stores the program in TSA.
Checksum: # 24644d
Bytes: 92.5
Example: Execute SETTS and TSA to build and display in succession a series of Taylor's polynomial
approximations of the sine function.
Set Radians mode and execute SETTS to build the list of graphics objects. (SETTS takes several minutes to
execute.) Then execute TSA to display each plot in succession. The display shows TSA in progress.
!&H !ANGLE !RAD ( if necessary)
J %SETTS%
%TSA%
Press − to stop the animation. Press !&H !ANGLE !DEG to restore Degrees mode.
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