HP 39GS hp 39gs_user's guide_English_E_HDPMG39AE13.pdf - Page 191

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. Matrices 15-3