Casio FX-991ES User Guide - Page 60
Performing Matrix Calculations
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(3) Press a number key (1 through 6) to specify the matrix dimension you want to use. • Pressing a number key to specify the matrix dimension causes the matrix editor screen to appear. MAT "A" stands for "MatA". (4) Use the matrix editor screen to input each of the elements into the matrix. • Input is subject to the same rules as those that govern the coefficient editor screen in the EQN Mode. For more information, see "Rules for Inputting and Editing Coefficients". • If you want to create another matrix, repeat this procedure from step (1). Copying the Contents of One Matrix to Another Matrix (1) Use the matrix editor screen to display the matrix you want to copy, or display the Matrix Answer Memory screen. • If you want to copy Matrix A, for example, press 14(MATRIX) 2(Data)1(MatA). (2) Press 1t(STO). • This causes the "STO" indicator to appear on the display. (3) Specify the destination of the copy operation. To specify this destination: Matrix A Matrix B Matrix C Press this key: y(MatA) e(MatB) w(MatC) • Pressing e(MatB) copies the matrix to Matrix B, and displays the matrix editor screen for Matrix B. k Performing Matrix Calculations Pressing A while the matrix selection screen or matrix editor screen is on the display switches to the matrix calculation screen. Matrix Answer Memory Screen The Matrix Answer Memory (MatAns) screen shows the results of matrix calculations. MAT Stands for "MatAns". E-58