# HP F2226A - 48GII Graphic Calculator User Manual Page 280

Graphing calculator.

Activate the Matrix Writer again by using „², and press L to check
out the second soft key menu at the bottom of the display. It will show the
keys:
@+ROW@ @-ROW @+COL@ @-COL@
The @+ROW@ key will add a row full of zeros at the location of the
The @-ROW key will delete the row corresponding to the selected cell of
The @+COL@ key will add a column full of zeros at the location of the
The @-COL@ key will delete the column corresponding to the selected
STK@@ key will place the contents of the selected cell on the stack.
The
@→
The @GOTO@ key, when pressed, will request that the user indicate the
number of the row and column where he or she wants to position the
cursor.
Pressing L once more produces the last menu, which contains only one
function @@DEL@ (delete).
The function @@DEL@ will delete the contents of the selected cell and
replace it with a zero.
To see these keys in action try the following exercise:
(1) Activate the Matrix Writer by using „². Make sure the @VEC and
@GO
keys are selected.
(2) Enter the following:
(3) Move the cursor up two positions by using ———. Then press @-ROW.
The second row will disappear.
(4) Press @+ROW@. A row of three zeroes appears in the second row.
@→
1`2`3`
L @GOTO@ 2@@OK@@ 1 @@OK@@ @@OK@@
2`1`5`
4`5`6`
7`8`9`
STK@@ @GOTO@
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