HP 48gII Graphing Calculator Manual do Utilizador descarregar pdf (Página 256)

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Page 8-1

Chapter 8

Operations with lists

Lists are a type of calculator’s object that can be useful for data processing

and in programming. This Chapter presents examples of operations with lists.

Definitions

A list, within the context of the calculator, is a series of objects enclosed

between braces and separated by spaces (#), in the RPN mode, or

commas (‚í), in both modes. Objects that can be included in a list are

numbers, letters, character strings, variable names, and/or operators. Lists

are useful for manipulating data sets and in some programming applications.

Some examples of lists are:

{ t 1 }, {"BETA" h2 4}, {1 1.5 2.0},

{a a a a}, { {1 2 3} {3 2 1} {1 2 3}}

In the examples shown below we will limit ourselves to numerical lists.

Creating and storing lists

To create a list in ALG mode, first enter the braces key „ä (associated

with the + key), then type or enter the elements of the list, separating them

with commas (‚í). The following keystrokes will enter the list {1 2 3 4}

and store it into variable L1.

„ä 1 ‚í 2 ‚í 3 ‚í 4

™K~l1`

The screen will show the following:

The figure to the left shows the screen before pressing `, while the one to

the right shows the screen after storing the list into L1. Notice that before

pressing ` the list shows the commas separating its elements. However,

after pressing `, the commas are replaced with spaces.

Entering the same list in RPN mode requires the following keystrokes:

1 2 ... 251 252 253 254 255 256 257 258 259 260 261 ... 863 864

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