HP 39g+ - Manual (Page 181)

Matrices 13-3
To create a matrix
in the Matrix
Catalog 1. Press MATRIX to open the Matrix Catalog. The
Matrix catalog lists the 10 available matrix variables,
M0 to M9.
2. Highlight the matrix variable name you want to use
and press .
3. Select the type of matrix to create.
– For a vector (one-dimensional array),
select Real vector or Complex vector.
Certain operations (+, –, CROSS) do not
recognize a one-dimensional matrix as a vector,
so this selection is important.
– For a matrix (two-dimensional array),
select Real matrix or Complex matrix.
4. For each element in the matrix, type a number or an
expression, and press . (The expression may
not contain symbolic variable names.)
For complex numbers, enter each number in
complex form; that is, (a, b), where a is the real part
and b is the imaginary part. You must include the
parentheses and the comma.
5. Use the cursor keys to move to a different row or
column. You can change the direction of the highlight
bar by pressing
. The menu key toggles
between the following three options:
–
specifies that the cursor moves to the cell
below the current cell when you press .
– specifies that the cursor moves to the cell to
the right of the current cell when you press
.
– specifies that the cursor stays in the current
cell when you press .
6. When done, press MATRIX to see the Matrix
catalog, or press to return to HOME. The
matrix entries are automatically stored.