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
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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 + L1," where L1 is already defined, is a formula. The
formula always contains at least one other list. In addition, for
a formula like L3="2+L1+ L2," L1 and L2 must have the same
number of elements. Then, each element in L3 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, L2="2+ L1," L3="3+L1," and
L4="4+L1").
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