HP 50g Graphing Calculator User Manual

Page 282

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Page 9-5

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.

(5) Press

@-COL@. The first column will disappear.

(6) Press

@+COL@. A row of two zeroes appears in the first row.

(7) Press

@GOTO@ 3@@OK@@ 3@@OK@@ @@OK@@ to move to position (3,3).

(8) Press

@→

STK@@. This will place the contents of cell (3,3) on the stack, although

you will not be able to see it yet.

(9) Press

` to return to normal display. Element (3,3) and the full matrix will

be available in the screen.

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