Deleting Old Data; Editing Data; Finding First Differences - Texas Instruments TI-84 Plus Manual

In this text, we usually use list
are any data values already in your lists, first delete any "old" data using the following
procedure. (If your lists are clear, skip these instructions.)

DELETING OLD DATA

delete any previously entered data. There are several ways to do this, and the most convenient
method is illustrated below.
Access the data lists with
different values in your lists if you are deleting "old" data.) Use
to move the cursor over the name
▲
ENTER .
Use to move the cursor over
► ▲
the name Press
L2.
Repeat this procedure to clear old data
from any of the other lists you will use.
(Now you are ready to enter new data.)
Position the cursor in the first location in list
data into list
L1
column, pressing
After typing the sixth input value, 2004, use
cursor go to the top of list
typing the entries from top to bottom in the
after each tax value.
ENTER

EDITING DATA

keys
► , ◄ , ▲ ,
correct value. Press
•
To insert a data value, put the cursor over the value that will be directly below the one you
will insert, and press
move down one location and a 0 is filled in at the insertion point. Type the data value to
be inserted over the 0 and press
•
To delete a single data value, move the cursor over the value you wish to delete and press
The values in the list below the deleted value move up one location.
DEL .
FINDING FIRST DIFFERENCES When the input values are evenly spaced, you can use
program to compute first differences in the output values. Program
DIFF
download at the Calculus Concepts web site:
http://college.hmco.com/mathematics/latorre/calculus_concepts/3e/students/programs.html
18
for the input data and list
L1
Whenever you enter new data in your calculator, you should first
STAT 1 [EDIT].
L1.
CLEAR ENTER .
by typing the years from top to bottom in the
after each entry.
ENTER
. Enter the output data in list
L2
If you incorrectly type a data value, use the cursor keys
and/or ) to darken the value you wish to correct and then type the
▼
ENTER .
2ND DEL (INS).
ENTER
L2
(You probably have
Press
CLEAR
. Enter the input
L1
L1
to cause the
►
by
L2
column, pressing
L2
The values in the list below the insertion point
. The 0 is replaced with the new value.
Copyright © Houghton Mifflin Company. All rights reserved.
Chapter 1
for the output data. If there
(
i.e., the arrow
available to
DIFF