The Elimination window will pop up with an empty matrix having the correct dimensions. -(it is calculated and resized in the class in ge.java) You can enter data elements into each text field to define a specific problem. If you just want to test this program, you can click on GENERATE RANDOM # to get a random numbers to play with.
To normalize a row, simply click on the variable-button situated on the diagonal for the row that you want to normalize. To make a nondiagonal element zero, click on the variable-button to the right of that element. To swap rows, click on the two rows you want to swap in the SWAP column.
Coefficients on the diagonal are highlighted in Yellow colour.