Section 12: Calculating with Matrices 145
Keystrokes Display
´ > 1
Sets beginning row and
column numbers in R
0
and R
1
to 1. (Display shows the
previous result.)
´ U
Activates User mode.
1 O A
A 1,1
Row 1, column 1 of A.
(Displayed momentarily while
A key held down.)
1.0000
Value of a
11
.
2 O A
2.0000
Value of a
12
.
3 O A
3.0000
Value of a
13
.
4 O A
4.0000
Value of a
21
.
5 O A
5.0000
Value of a
22
.
6 O A
6.0000
Value of a
23
.
l A
A 1,1
Recalls element in row 1,
column 1. (R
0
and R
1
were
reset in preceding step.)
1.0000
Value of a
11
.
l A
2.0000
Value of a
12
.
l A
3.0000
Value of a
13
.
l A
4.0000
Value of a
21
.
l A
5.0000
Value of a
22
.
l A
6.0000
Value of a
23
.
´ U
6.0000
Deactivates User mode.
Checking and Changing Matrix Elements Individually
The calculator provides two ways to check (recall) and change (store) the
value of a particular matrix element. The first method uses storage
registers R
0
and R
1
in the same way as described above—except that the
row and column numbers aren’t automatically changed when User mode
is deactivated. The second method uses the stack to define the row and
column numbers.
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