Matrix Calculations In The Home View - HP 39g Master Manual

If you look at the list of screen keys on the
bottom of the view, you will see one labeled
. This determines which way the
highlight will move (across or down) when you
enter a number. If you press the key
repeatedly you will see it change from
(across), to (down), to
You will also see the usual
key that can be used to insert an extra
row or column into an existing matrix. The
keyboard DEL key can be used to delete a row
or column.
With movement set to
numbers 1, 2 and 3, pressing ENTER after
each. Your display should now look like the
screen shot right.
If you now press the down arrow key on the
keyboard the highlight will move back to the
first element in the second row. Enter the
numbers 4, 5 and 6 and you will find that the
calculator automatically drops down to row
three without the need to use the down arrow
key again, since it now knows how many columns the matrix is to contain.
Finish your matrix so that it looks like the one shown right.
Now press MATRIX to switch back to the MATRIX Catalog and,
with the highlight on M2, press
shown right.
Matrix calculations in the
Switch to the HOME view and multiply
M1*M2. As you can see, the result
displayed in the HOME view is not very
useful or readable. Pressing
displays the matrix in a far more readable
manner.
(no movement).
key, and an
, type in the
and create the matrix
HOME
view
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