Texas Instruments TI-89 Developer's Guide

1236
Appendix B: Global Variables — Graphing
TI
-
89 / TI
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92 Plus Developer Guide
Not for Distribution
Beta Version January 26, 2001
gr_active, gr_other
(continued)
GR_COORD_POLAR — Graph Coordinates:
POLAR = GR_COORD_POLAR set
GR_COORDOFF reset
RECT = GR_COORD_POLAR reset
GR_COORDOFF reset
SBYTE gr_xaxis — X Axis for SEQUENCE or DIFF
EQUATIONS CUSTOM Axes setting:
SEQUENCE X Axis:
n = -1
u = 0
u1, u2, . . . , u99 = 1, 2, . . . , 99
DIFF EQUATIONS X Axis:
t = 0
y = 100
y1, y2, . . . , y99 = 1, 2, . . . , 99
y' = -100
y1', y2', . . . , y99' = -1, -2, . . . , -99
SBYTE gr_yaxis — Y Axis for SEQUENCE or DIFF
EQUATIONS CUSTOM Axes setting
SEQUENCE Y Axis:
n = -1
u = 0
u1, u2, . . . , u99 = 1, 2, . . . , 99
DIFF EQUATIONS Y Axis:
t = 0
y = 100
y1, y2, . . . , y99 = 1, 2, . . . , 99
y' = -100
y1', y2', . . . , y99' = -1, -2, . . . , -99
WORD gr_fmt_flags2 — Graph Format flags
GR_DE_CUSTOM — DIFF EQUATIONS Axes =
CUSTOM if set
(continued)

Texas Instruments TI-89 Specifications

General

Display size (HxV)	100 x 160 mm
Memory type	639K FLASH ROM, 188K bytes RAM
Compatible operating systems	Operating System 2.09
Battery type	AAA