HP 48GII User Manual

Full Command and Function Reference 3-47
If EQ contains a list, the initial value problem is solved and plotted using a combination of
Rosenbrock (3,4) and Runge-Kutta-Fehlberg (4,5) methods. In this case DIFFEQ uses
RRKSTEP to calculate y
f
, and EQ must contain two additional elements:
• The second element of EQ must evaluate to the partial derivative of Y' with respect to X,
and can return a real value or real vector when evaluated.
• The third element of EQ must evaluate to the partial derivative of Y' with respect to Y, and
can return a real value or a real matrix when evaluated.
Access: …µ
DIFFEQ
Input/Output: None
See also: AXES, CONIC, FUNCTION, PARAMETRIC, POLAR, RKFSTEP, RRKSTEP, TRUTH
DIR
Type: Function
Description: Creates an empty directory structure in run mode. Can be used as an alternative to CRDIR to
create an empty directory by typing DIR ‘NAME’ STO, which will create an empty directory
‘NAME’ if it does not already exist in the current directory.
Access: …µDIR
Input/Output:
Level 1/Argument 1 Level 1/Item 1
→
DIR …END
See also: CRDIR
DISP
Type: Command
Description: Display Command: Displays obj in the nth display line.
n ≤ 1 indicates the top line of the display.
To facilitate the display of messages, strings are displayed without the surrounding " " delimiters.
All other objects are displayed in the same form as would be used if the object were in level 1 in
the multiline display format. If the object display requires more than one display line, the display
starts in line n, and continues down the display either to the end of the object or the bottom of
the display. The object displayed by DISP persists in the display only until the keyboard is ready
for input. The FREEZE command can be used to cause the object to persist in the display until
a key is pressed.
Access: !°L
OUT DISP ( °is the left-shift of the Nkey).
Input/Output:
Level 2/Argument 1 Level 1/Argument 2 Level 1/Item 1
obj n
→
See also: DISPXY, FREEZE, HALT, INPUT, PROMPT
DISPXY
Type: Command
Description: Display Command: Displays obj at the specified screen coordinates using a specified font size.
The list argument expects exactly two binary integers to specify the X and Y coordinates. The
level one integer argument
n will display the obj using a small font if n is 1 and using the system
font if n is 2.
To facilitate the display of messages, strings are displayed without the surrounding " " delimiters.
All other objects are displayed in the same form as would be used if the object were in level 1 in

HP 48GII Specifications

General

Battery type	CR2032
Type	Scientific
Form factor	Pocket

Weight and Dimensions

Weight	220 g
Dimensions (WxDxH)	184 x 87 x 23.5 mm

Summary

RPL Programming

Understanding Programs

Programs as objects, delimiters, and basic structure.

Entering and Executing Programs

Details on how to create, store, and run programs.

Using Conditional Structures

Covers IF, CASE, IFT, IFTE structures for program decision-making.

Input and Output Commands

Details commands like PROMPT, INPUT, INFORM, CHOOSE for user interaction.

RPL Programming Examples

Fibonacci Numbers

Demonstrates recursive and loop-based Fibonacci calculations.

Minimum and Maximum Array Elements

Details finding min/max elements using MNX and MNX2.

Applying a Program to an Array

Explains the APLY command for transforming array elements.

Full Command and Function Reference

How to Access Commands and Functions

Explains key presses and menu paths to access commands.

ABS (Absolute Value)

Details the absolute value function and its array behavior.

ACOS (Arc Cosine)

Explains the inverse cosine function, domain, and range.

Computer Algebra Commands

CAS Operations

Overview of CAS operations and their categorization by menu.

Algebra commands

Lists and describes commands for algebraic manipulation.

Calculus Commands

Covers derivation, integration, and limit commands.

Equation Reference

Columns and Beams (1)

Provides equations for structural mechanics.

Electricity (2)

Lists equations related to electrical circuits and laws.

Fluids (3)

Covers equations for fluid mechanics.

The Development Library

Introduction

Explains the purpose and usage of the development library.

Tools for Development

Details APEEK, PEEK, POKE, POKEARM commands.

MASD Compiler

Discusses syntax, modes, and directives for MASD.

Error and Status Messages

Messages Listed Alphabetically

Alphabetical list of error messages.

Messages Listed Numerically

Numerical list of error messages by hex code.

System Flags

System Flags (continued)

Description of various system flags.

System Flags (continued)

Continuation of system flags description.

Reserved Variables

Contents of the Reserved Variables

Explanation of key reserved variables.

PPAR

Details plotting parameters.

Technical Reference

Object Sizes

Lists object sizes in bytes.

Symbolic Integration Patterns

Provides a table of symbolic integration patterns.

Parallel Processing With Lists

General rules for parallel processing

Explains conditions for parallel list processing.

Group 4: ADD and +

Describes how ADD and + handle parallel list operations.

Keyboard Shortcuts

Press and Hold key combinations

Lists functions performed by key combinations.

Shifted softkeys

Explains shift key effects on menu labels.

The Menu-Number Table

-- menus 0-117 are semi-compatible with 48G menus --

Menu numbers and paths for built-in menus.

-- New Library 222 commands --

Details commands available in Library 222.