Texas Instruments TI-89 Titanium User Manual

Appendix A: Functions and Instructions 789
DrawParm CATALOG
DrawParm expression1 , expression2
[, tmin ] [, tmax ] [, tstep ]
Draws the parametric equations expression1 and
expression2 , using t as the independent variable.
Defaults for
tmin , tmax , and tstep are the current
settings for the Window variables
tmin , tmax , and
tstep . Specifying values does not alter the window
settings. If the current graphing mode is not
parametric, these three arguments are required.
Note: Regraphing erases all drawn items.
In function graphing mode and
ZoomStd
window:
DrawParm
tù cos(t),tù sin(t),0,10,.1
¸
DrawPol CATALOG
DrawPol expression [, q min ] [, q max ] [, q step ]
Draws the polar graph of expression , using q as the
independent variable.
Defaults for
q min , q max , and q step are the current
settings for the Window variables
qmin , qmax , and
qstep . Specifying values does not alter the window
settings. If the current graphing mode is not polar,
these three arguments are required.
Note: Regraphing erases all drawn items.
In function graphing mode and
ZoomStd
window:
DrawPol 5ù cos(3ù q),0,3.5,.1
¸
DrawSlp CATALOG
DrawSlp x1 , y1 , slope
Displays the graph and draws a line using the
formula
yì y1=slopeø (xì x1) .
Note: Regraphing erases all drawn items.
In function graphing mode and
ZoomStd
window:
DrawSlp 2,3,ë 2 ¸
DropDown CATALOG
DropDown titleString , { item1String , item2String , ...},
varName
Displays a drop-down menu with the name titleString
and containing the items 1: item1String , 2: item2String ,
and so forth.
DropDown must be within a
Dialog...EndDlog block.
If
varName already exists and has a value within the
range of items, the referenced item is displayed as
the default selection. Otherwise, the menu’s first
item is the default selection.
When you select an item from the menu, the
corresponding number of the item is stored in the
variable
varName . (If necessary, DropDown creates
varName .)
See
Dialog program listing example.

Texas Instruments TI-89 Titanium Specifications

General

Brand	Texas Instruments
Model	TI-89 Titanium
Category	Calculator
Language	English