HP 48gII - Manual (Page 281)

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(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.
Summary of Matrix Writer use for entering vectors
In summary, to enter a vector using the Matrix Writer, simply activate the
writer (
„²), and place the elements of the vector, pressing ` after
each of them. Then, press ``. Make sure that the @VEC and @GO → @
keys are selected.
Example:
„²³~„xQ2`2`5\``
produces: [‘x^2‘ 2 –5 ]
Building a vector with ARRY
The function → ARRY, available in the function catalog ( ‚N‚é,
use —˜ to locate the function), can also be used to build a vector or
array in the following way. In ALG mode, enter ARRY(vector elements,
number of elements), e.g.,
In RPN mode:
(1) Enter the n elements of the array in the order you want them to appear in
the array (when read from left to right) into the RPN stack.
(2) Enter n as the last entry.
(3) Use function ARRY.