Texas Instruments TI-83 PLUS - Manual (Page 722)

TI-83 Plus Tables and Reference Information 719
Except for system variables, you can store any string of characters,
functions, instructions, or variables to the functions Y
n , (1 through 9, and
0), X n T
/Y n T
(1 through 6), r n (1 through 6), u( n ), v( n ), and w( n ) directly or
through the
Y=
editor. The validity of the string is determined when the
function is evaluated.
Archive Variables
You can store data, programs or any variable from RAM to user data
archive memory where they cannot be edited or deleted inadvertantly.
Archiving also allows you to free up RAM for variables that may require
additional memory. The names of archived variables are preceded by an
asterisk
“*” indicating they are in user data archive.
System Variables
The variables below must be real numbers. You may store to them.
Since the
TI-83 Plus can update some of them, as the result of a
ZOOM
,
for example, you may want to avoid using these variables to store
nongraphing data.
•
Xmin, Xmax, Xscl, @ X, XFact, Tstep, PlotStart, n Min, and other
window variables.
•
ZXmin, ZXmax, ZXscl, ZTstep, ZPlotStart, Zu( n Min), and other
ZOOM
variables.