To create a matrix in the matrix catalog

1.Press >6+,)7@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 1(:_.

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￿>(17(5@. (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 *2_. The *2_ menu key toggles between the following three options:

–*2_￿_ specifies that the cursor moves to the cell below the current cell when you press >(17(5@.

–*2#_ specifies that the cursor moves to the cell to the right of the current cell when you press >(17(5@.

–*2_ specifies that the cursor stays in the current cell when you press >(17(5@.

6.When done, press >6+,)7@MATRIX to see the Matrix catalog, or press￿>+20(@ to return to HOME. The matrix entries are automatically stored.

A matrix is listed with two dimensions, even if it is 3×1. A vector is listed with the number of elements, such as 3.

Matrices

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