HP 49g+ - Manual (Page 276)

Page 9-5
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@ @→ STK@@ @GOTO@
The @+ROW@ key will add a row full of zeros at the location of the
selected cell of the spreadsheet.
The
@-ROW key will delete the row corresponding to the selected cell of
the spreadsheet.
The
@+COL@ key will add a column full of zeros at the location of the
selected cell of the spreadsheet.
The
@-COL@ key will delete the column corresponding to the selected
cell of the spreadsheet.
The
@→ STK@@ key will place the contents of the selected cell on the stack.
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:
1`2`3`
L @GOTO@ 2@@OK@@ 1 @@OK@@ @@OK@@
2`1`5`
4`5`6`
7`8`9`
(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.