Texas Instruments TITANIUM TI-89 - Manual (Page 519)

Data/Matrix Editor 519
Matrix Variable Matrix Variable Matrix Variable Matrix Variable
A matrix is a rectangular array of elements. When you create a matrix in the Data/Matrix
Editor, you must specify the number of rows and columns (although you can add or
delete rows and columns later). In the Data/Matrix Editor, a matrix variable:
After creating a matrix in the Data/Matrix Editor, you can use the matrix in any
application (such as the Home screen).
Note: Use brackets to refer to a specific element in a matrix. For example, enter mat1[2,1]
to access the 1st element in the 2nd row.
• Looks similar to a data variable, but all
columns must have the same length.
• Is initially created with 0 in each cell. You
can then enter the applicable value in
place of 0.
From the Home screen or a program, you can
use
9 to store a matrix with either of the
equivalent methods shown to the right.
Ê
row 1
Ë
row 2
Ì
row 1
Í
row 2
Although you enter the matrix as shown
above, it is pretty printed in the history area in
traditional matrix form.
Shows the size of the
matrix.
[[1,2,3][4,5,6]]
!
mat1
[1,2,3;4,5,6]
!
mat1
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