Owner's manual
Table Of Contents
- Material covered
- The HP 49G documentation set
- Chapter 1
- Entering commands
- Keyboard entry
- Subject-specific menus
- Displaying system Flags
- Setting and clearing Flags
- User Flags
- Chapter 3
- Command line operations
- Activating the command line
- Positioning the cursor
- Helpful commands and sub-menus
- Selecting characters
- Copy, cut, and paste
- Editing the command Line
- Command Line information
- Chapter 4
- Using the stack
- Example stack calculations
- Chapter 5
- Matrices and linear algebra
- Matrix Writer operations
- Advanced matrix operations
- Creating special matrices
- Assembling matrices
- To assemble a matrix by rows From a series of vectors
- To assemble a matrix by columns From a series of vectors
- To assemble a matrix with a particular diagonal From a vector
- To assemble a matrix From a sequence oF elements
- To disassemble a matrix into its elements
- To disassemble a matrix into row vectors
- To disassemble a matrix into column vectors
- To extract the vector oF diagonals From a matrix
- To insert one or more new rows into a matrix
- To insert one or more new columns into an array
- To extract a particular row From an array
- To extract a particular column From an array
- Swapping rows and columns
- Extracting and replacing elements oF matrices
- More matrix arithmetic
- To change the sign of each element in a matrix
- To multiply a matrix and vector
- To divide an array by a square matrix
- To combine two real matrices into a complex matrix
- To split a complex matrix into two real matrices
- To conjugate each element of a complex matrix
- To extract the matrix of real parts from a complex matrix
- To extract the matrix of imaginary parts From a complex matrix
- Eigenvalues and eigenvectors
- To compute the eigenvalues For a square matrix
- To compute the eigenvalues and eigenvectors For a square matrix
- To compute the singular values oF a matrix
- To decompose or factor a matrix
- Overview of the Units application
- Unit objects
- Converting units
- Calculating with units
- Working with temperature units
- Chapter 7 Constants Library
- To view the constants library
- To copy a constant to the stack or history
- To include a constant in an algebraic expression
- Chapter 8 Number bases
- Entering and displaying binary integers
- To set the base
- To set the wordsize
- To recall the current wordsize
- To enter a binary integer
- To add, subtract, multiply, or divide two binary integers
- To find the negative of a binary integer
- To convert a binary integer to a diFFerent number base
- To convert a binary integer to a real number
- To convert a real number to a binary integer
- Using Boolean operators
- Manipulating bits and bytes
- List Processing
- Applying a Function or program to a List
- List Manipulations
- Chapter 10
- Advanced plotting options Labelling and relocating the axes
- Plotting programs
- Plotting range vs. display range
- To check the current size oF PICT
- To use computed values for plotting or display ranges
- Saving and Restoring Plots
- Chapter 11
- How memory is structured
- Accessing port contents
- Backup objects
- Using data in backup objects
- How the HP 49G manages memory
- To list a port’s contents, and find Free memory
- Chapter 12
- Date and time arithmetic Date and time Formats
- Date and time tools
- Calculating with dates
- Calculating with times
- Chapter 13 Customization
- Creating menus
- User mode
- Chapter 14
- Computer Algebra Commands
- Alphabetical command list
- 1 q
- Index
Unit objects
A unit object has two parts: a real number and a unit expression (a single
unit or multiplicative combination of imits). The two parts are linked by
the imderscore character For example, 2_in (2 inches) and 8.303_gal/Ii
(8.303 US gallons per hour) are imit objects. Like other object types, a unit
object can be placed on the stack, stored in a variable, and used in
algebraic expressions and programs.
Wlien you perform a unit conversion, the HP 49G replaces the old unit
expression with the new unit expression you specify, and automatically
multiplies the number by the appropriate conversion factor.
Operators in unit objects follow this order of precedence:
1. ( )
2. ^
3. *and/
For example, 7_m/s^2 is 7 meters per second squared, and 7__(mys)^2 is 7
square meters per second squared.
To create a unit object
1. Key in the number part of the unit object.
2. Press 0 Q.
3. Press 0 (iJNifS) to display the Units menu.
4. Press @ or @ imtil the category of the unit is highlighted.
5.
Press OK or
(ENTER).
6. Press (0 or ® imtil the imit is higlilighted.
7.
Press OK or
(ENTER).
8. For compoimd imits, repeat from steps 3 for each additional miit in the
unit expression, preceding each with ®, 0, or (0 as required.
If you Imow the imit abbreviation, you can type it directly on the
conmiiBid line instead of selecting it from the Units menu. Note
that unit names are case-sensitive; for example, Hz (hertz) must be
typed witii an uppercase H and a lowercase z.
In addition to the method outlined above, you can create a imit object in
RPN mode by assembling it from components on the stack.
Page 6-2 Unit objects