HP 48gII User Manual page 119

Press ` once more to place the matrix on the stack. The ALG mode stack is
shown next, before and after pressing , once more:
If you have selected the textbook display option (using H@) D ISP! and checking
off ), the matrix will look like the one shown above. Otherwise,
Textbook
the display will show:
The display in RPN mode will look very similar to these.
Typing in the matrix directly into the stack
The same result as above can be achieved by entering the following directly
into the stack:
„Ô
„Ô 2.5\ ‚í 4.2 ‚í 2 ™
‚í
„Ô .3 ‚í 1.9 ‚í 2.8 ™
‚í
„Ô 2 ‚í .1\ ‚í .5
Thus, to enter a matrix directly into the stack open a set of brackets („Ô)
and enclose each row of the matrix with an additional set of brackets
(„Ô). Commas (‚í .) should separate the elements of each
row, as well as the brackets between rows.
For future exercises, let's save this matrix under the name A. In ALG mode
use K~a. In RPN mode, use ³~a K.
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