Texas Instruments Titanium TI-89 User Manual

Appendix A: Functions and Instructions 857
PtText CATALOG
PtText string , x , y
Displays the Graph screen and places the
character string
string on the screen at the pixel
nearest the specified (
x, y ) window coordinates.
string is positioned with the upper-left corner of
its first character at the coordinates.
PtText "sample",3,5 ¸
PxlChg CATALOG
PxlChg row , col
PxlChg
rowList , colList
Displays the Graph screen and reverses the pixel
at pixel coordinates (
row , col ).
Note: Regraphing erases all drawn items.
PxlChg 2,4 ¸
PxlCrcl CATALOG
PxlCrcl row , col , r [, drawMode ]
Displays the Graph screen and draws a circle
centered at pixel coordinates (
row , col ) with a
radius of
r pixels.
If
drawMode = 1, draws the circle (default).
If
drawMode = 0, turns off the circle.
If
drawMode = -1, inverts pixels along the circle.
Note: Regraphing erases all drawn items. See
also
Circle.
PxlCrcl 40,80,30,1 ¸
PxlHorz CATALOG
PxlHorz row [, drawMode ]
Displays the Graph screen and draws a horizontal
line at pixel position
row .
If
drawMode = 1, draws the line (default).
If
drawMode = 0, turns off the line.
If
drawMode = -1, turns a line that is on to off or
off to on (inverts pixels along the line).
Note: Regraphing erases all drawn items. See
also
LineHorz.
PxlHorz 25,1 ¸
PxlLine CATALOG
PxlLine rowStart , colStart , rowEnd , colEnd [, drawMode ]
Displays the Graph screen and draws a line
between pixel coordinates (
rowStart , colStart ) and
(
rowEnd , colEnd ), including both endpoints.
If
drawMode = 1, draws the line (default).
If
drawMode = 0, turns off the line.
If
drawMode = -1, turns a line that is on to off or
off to on (inverts pixels along the line).
Note: Regraphing erases all drawn items. See
also
Line.
PxlLine 50,15,20,90,1 ¸

Texas Instruments Titanium TI-89 Specifications

General

Display Type	LCD
Display Resolution	160 x 100 pixels
Memory	188 KB RAM, 2.7 MB Flash ROM
Type	Graphing Calculator
Display	Monochrome
Processor	Motorola 68000
Processor Speed	12 MHz
Power Source	4 AAA batteries
Connectivity	USB
Programming	TI-BASIC, Assembly
Operating System	AMS (Advanced Mathematics Software)