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Dependent numerical lists – Texas Instruments TI-73 EXPLORER User Manual

Page 89

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Chapter 5: Lists

83

7305ENG.DOC CH 5 Lists, English Julie Hewlett Revised: 07/29/98 12:04 PM Printed: 05/19/99 8:59 AM Page

83 of 30

Dependent Numerical Lists

The numerical list described in the previous section (

¨

NUM

) is

an independent list. You also can create dependent lists,

which are dependent (or based) upon the contents of another

defined numerical list.
You create a dependent list by attaching a formula to it. For

example,

"2 + L

1

,

"

where

L

1

is already defined, is a formula. The

formula always contains at least one other list. In addition, for

a formula like

L

3

="2 + L

1

+ L

2

,"

L

1

and

L

2

must have the same

number of elements. Then, each element in

L

3

is the result of

the attached formula.
When a formula is attached to a list, a small signifier (2)

appears next to the list name. You cannot edit a dependent list

by simply typing over an element as with independent lists.

You must highlight the element you want to change, press

b, and then edit it. However, this changes the entire list

back to an independent list, and the formula and the formula

signifier disappear.
Also, it is possible to have multiple dependent lists all based

on the same list (for example,

L

2

="2+ L

1

,

"

L

3

="3+L

1

,

"

and

L

4

="4+L

1

"

).

An attached formula can be enclosed in quotation marks

(located in the Text editor). A list whose formula:

Is not enclosed in quotation marks is not automatically

updated if the independent list changes.

Is enclosed in quotation marks is automatically updated if

the independent list changes.

Convert the following six Celsius temperatures

{M40,M15,M5,30,58,140} to Fahrenheit and display both lists in the

List editor.

³

¨CEL={M40,M15,M5,30,58,140}

¨FRHT="¨CEL degC8degF"

Independent List

Dependent List