HP 48g Graphing Calculator - Manual (Page 166)

14
5. After you’ve entered all of the numl)ers in the matrix, press f ENTER )
to put the matrix on the stack.
For more details about using the Matrix Writer, see chapter 8.
To enter a matrix using the command line:
1. Press (5D(n) and f^(TT) to type the delimiters for the matrix and
for the first row.
2. Key in the first row. Press (SPC~) to separate the elements.
3. Press to move the cursor past the
J
row delimiter.
4. Optional: Press (SO (new line) to start a new row in the
display.
5. Key in the rest of the matrix. You don’t need C ] delimiters for
subsequent rows— they’re added automatically later.
6.
Press
(ENTER).
The HP 48 has built-in commands to automatically create special
matrices that are often used in conjunction with matrices you create
element by element.
To create an array filled wi en constant:
1. Enter one of the following onto the stack:
■ A list containing the dimensions of the desired constant array:
C roius columns >.
D Any array whose elements you don’t mind changing.
2. Enter the constant that you want in the array.
3. Press (MTHI M
h T R m a k e C O N . This returns an array of the
same dimensions as you entered (or that the argument array had)
filled with your chosen constant.
To create an identity matrix:
1. Enter one of the following onto the stack:
a A real number representing the number of rows and columns
you want in the square identity matrix (fractional values are
rounded).
a
Any square matrix whose elements you don’t mind changing.
2. Press ( mth ) M h T R M A K E I D N . Returns a square identity
matrix of the given dimensions.
14-2 Matrices and Linear Algebra