HP 39GS hp 39gs_user's guide_English_E_HDPMG39AE13.pdf - Page 194

To store one element In HOME, enter, value matrixname(row, column). For example, to change the element in the first row and second column of M5 to 728, then display the resulting matrix: 728 M5 1 2 M5 . An attempt to store an element to a row or column beyond the size of the matrix results in an error message. Matrix arithmetic You can use the arithmetic functions and powers) with matrix arguments. Division left-multiplies by the inverse of the divisor. You can enter the matrices themselves or enter the names of stored matrix variables. The matrices can be real or complex. For the next examples, store [[1,2],[3,4]] into M1 and [[5,6],[7,8]] into M2. Example 1. Create the first matrix. MATRIX 1 2 3 4 2. Create the second matrix. MATRIX 5 6 7 8 15-6 Matrices