Texas Instruments TI-89 Titanium User Manual page 813

Line
CATALOG
xStart yStart
Line , ,
Displays the Graph screen and draws, erases, or
inverts a line segment between the window
coordinates (
including both endpoints.
If
drawMode
If
drawMode
If
drawMode
to on (inverts pixels along the line).
Note: Regraphing erases all drawn items. See also
.
PxlLine
LineHorz
CATALOG
y drawMode
LineHorz [,
Displays the Graph screen and draws, erases, or
inverts a horizontal line at window position
If
drawMode
If
drawMode
If
drawMode
to on (inverts pixels along the line).
Note: Regraphing erases all drawn items. See also
.
PxlHorz
LineTan
CATALOG
expression1
LineTan
Displays the Graph screen and draws a line tangent
to
expression1
expression1
function, where
variable, and
that is tangent.
Note: In the example shown,
separately.
LineVert
CATALOG
x drawMode
LineVert [,
Displays the Graph screen and draws, erases, or
inverts a vertical line at window position
If
drawMode
If
drawMode
If
drawMode
to on (inverts pixels along the line).
Note: Regraphing erases all drawn items. See also
.
PxlVert
810
xEnd yEnd drawMode
, [, ]
, ) and ( ,
xStart yStart xEnd yEnd
= 1, draws the line (default).
= 0, turns off the line.
= ë 1, turns a line that is on to off or off
]
= 1, draws the line (default).
= 0, turns off the line.
= ë 1, turns a line that is on to off or off
expression2
,
at the point specified.
is an expression or the name of a
is assumed to be the independent
x
is the value of the point
expression2
x
expression1
does not graph
expression1.
LineTan
]
= 1, draws the line (default).
= 0, turns off the line.
= ë 1, turns a line that is on to off or off
In the
ZoomStd
erase it.
Line 0,0,6,9 ¸
),
@
"
¥ "
H
Line 0,0,6,9,0 ¸
In a
ZoomStd
LineHorz 2.5 ¸
.
y
In function graphing mode and a
window:
Graph cos(x)
@
"
¥ "
H
LineTan cos(x),p/4 ¸
is graphed
In a
ZoomStd
LineVert ë 2.5 ¸
.
x
Appendix A: Functions and Instructions
window, draw a line and then
window:
ZoomTrig
window: