Figure 01 ![]() |
We will start by making sure that this calculator is in the
CLASSIC mode. Press the ![]() Use the ![]() |
Figure 02 ![]() |
On this calculator we are indeed in CLASSIC mode, inicated by the
highlight in ![]() ![]() ![]() ![]() Leave Figure 02 by the sequence ![]() ![]() |
Figure 03 ![]() |
To directly enter a matrix the TI calculators ask us to use the
[ character to signal both the start of the matrix and the start of
a row. Then the ] character is used to signal the end of a row
and the eend of the matrix. Values inside a row are separated with a comma.
Therefore, the command to create our matrix A is
[[2,3,7][5,1,6]] and the keystrokes to do this would be
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
Figure 04 ![]() |
Press
![]() |
Figure 05 ![]() |
For Figure 05 we have typed the keys needed for the second matrix.
You might note that this matrix requires more keystrokes than did the first
one. In fact, as we see in Figure 05, the calculator automatically, in this
display mode, wraps our command onto a new line. Once we have finished typing the
command we press ![]() |
Figure 06 ![]() |
Here we see the new matrix. It is important to note that we have created these matrices but they have not been "stored" in a variable. In fact, having created the second one, shown in Figure 06, we have lost the first. We need to save these matrices in the variables that the calculator provides to hold such entities. |
Figure 07 ![]() |
We start, in Figure 07 by creating the matrix and then adding,
via the ![]() ![]() ![]() ![]() |
Figure 08 ![]() |
The MATRIX menu opens, as shown in Figure 08, with the start of the list of
names for the ten (10) defined matrix variables.
The first name is highlighted. To select the highlighted name we could press the
"Enter" key or press the number key of the item. We do not want
the highlighted item here so we will press ![]() |
Figure 09 ![]() |
Now that the desired [B] is selected we press ![]() |
Figure 10 ![]() |
All that our last action did was to paste the name of the
matrix, [B] at the end of the command that we have constructed.
That actually completes the command so we can
just press ![]() |
Figure 11 ![]() |
For Figure 11 we have gone through similar steps of creating the matrix [A]. |
Figure 12 ![]() |
If we return to the matrix menu, via
![]() ![]() |
Figure 13 ![]() |
We wo want to look at the different effects of using the alternative display option.
We use the ![]() ![]() ![]() |
Figure 14 ![]() |
We will start entering the command to create our first matrix. Figure 14 shows that unfinished command. At this point we cannot see any difference from what we did in the CLASSIC mode. However, when we type the next character, ], we begin to see in Figure 15, the different working of the MATHPRINT option. |
Figure 15 ![]() |
Notice in Figure 15 that the second to last ] has indeed been added to the command, but that the command has started to slide off the left end of the screen. MATHPRINT will keep our commands on a single line. |
Figure 16 ![]() |
We complete the cmmand, as shown in Figure 16,
and we continue to see that the command stays on one line.
To have the calculator perform the command we press the ![]() |
Figure 17 ![]() |
In Figure 17 we see two more changes attributable to the
MATHPRINT option. The first is that our command has been
recorded and replaced by ![]() ![]() Also in Figure 17 we have entered the command to create and store the second matrix. Once there we can press the ![]() |
Figure 18 ![]() |
Here we see the transformed command and the result in nice matrix form. |