20060301
k
Matrix Variable Element Operations
You can recall the value of any element of a MATRIX variable. When the data
1 2
3 4
is assigned to matrix “mat1”, for example, you can recall the element located at row 2,
column 1.
You can also assign a value to any element in a matrix. For example, you could assign the
value “5” to the element at row 1 column 2 in “mat1”, which produces the matrix
1 5
3 4
.
After performing the procedure under “Inputting Matrix Values with the
9
Keyboard”,
perform the following operation.
u
ClassPad Operation
(1) Recall the value in row 2, column 1 of MATRIX variable “mat1”.
0mat
b
9
[c,b]
w
↑
↑
Row Column
2-6-2
Matrix and Vector Calculations
(2) Assign “5” to the element at row 1, column 2 of MATRIX variable “mat1”.
f
W0mat
b
9
[b,c]
w�
Tip
• You can also perform the above operations on the “ans” variable (page 2-2-2) when it contains
MATRIX data.
Example:
[[b,c][d,e]]
w
1 2
3 4
D
[c,b]
w
3
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