To input data into a calculator as a matrix, begin by accessing the matrix menu. This is done by pressing the second button followed by the x^-1 key, which has the word "matrix" displayed above it. Once inside the matrix menu, navigate to the Edit option and select Matrix A to start editing the first matrix.

Next, specify the size of the matrix by entering the number of rows and columns. For example, if your data table has three rows labeled x, y, and z, and two columns, input 3 for rows and 2 for columns. This ensures the matrix dimensions match your data table.

After setting the matrix size, proceed to enter the data values cell by cell. Input each number carefully, pressing Enter after each entry to move to the next cell. For instance, if your data includes values like 63, 97, 23, 46, 98, and 45, enter them sequentially to fill the 3×2 matrix. Once all data is entered, the cursor will return to the top-left cell, confirming completion.

To recall the matrix for verification or further calculations, exit the editing mode by pressing second then quit to return to the main screen. Access the matrix menu again using second and x^-1, then select Matrix A from the Names tab. Press Enter to insert the matrix into the current screen, allowing you to view and confirm the data.

This process highlights the importance of understanding matrix dimensions and data entry for accurate representation of tabular data in calculators. Mastery of these steps facilitates efficient use of matrices in various mathematical and statistical applications.

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