Texas Instruments PLUS TI-89 - Manual (Page 225)

208 Chapter 12: Additional Graphing Topics
12ADDLGR.DOC TI-89/TI-92 Plus: Additional Graphing Tools (English) Susan Gullord Revised: 02/23/01 1:03 PM Printed: 02/23/01 2:15 PM Page 208 of 20
Enter the expression {2,4,6} sin(x) and graph the functions.
Graphs three functions:
2 sin(x), 4 sin(x), 6 sin(x)
Enter the expression {2,4,6} sin({1,2,3} x) and graph the functions.
Graphs three functions:
2 sin(x), 4 sin(2x), 6 sin(3x)
Similarly, you can use the Graph command from the Home screen or
a program as described on page 205.
graph {2,4,6}sin(x)
graph {2,4,6}sin({1,2,3}x)
When the graph format is set for Graph Order = SIMUL , the functions
are graphed in groups according to the element number in the list.
For these example functions, the
TI -89 / TI-92 Plus graphs three groups.
¦ 2 sin(x), x+4, cos(x)
¦ 4 sin(x), 2x+4
¦ 6 sin(x), 3x+4
The functions within each group are graphed simultaneously, but the
groups are graphed sequentially.
Pressing D or C moves the trace cursor to the next or previous
curve in the same family before moving to the next or previous
selected function.
Graphing a Family of Curves
By entering a list in an expression, you can plot a separate
function for each value in the list. (You cannot graph a family
of curves in
SEQUENCE or 3D graphing mode.)
Examples Using the
Y= Editor
Tip: Graph math results
may vary.
Tip: Enclose list elements in
braces (
2 [ and 2 \ )
and separate them with
commas.
Note: The commas are
shown in the entry line but
not in the function list.
Example Using the
Graph Command
Simultaneous
Graphs with Lists
Tip: To set graph formats
from the Y= Editor, Window
Editor, or Graph screen,
press:
TI
- 89: ¥ Í
TI - 92 Plus: ¥ F
When Tracing a
Family of Curves