2-6-4

Matrix and Vector Calculations

Tip

•In step (1) of the above procedure, we added rows and columns as they became necessary.

Another way to accomplish the same result would be to add rows and columns to create a blank matrix of the required dimensions, and then start data input. You could create a 2-row ⋅ 3-column

matrix by tapping 6, 6, 7, or 6, 8. In either case, you could also tap the buttons in reverse of the sequence shown here.

•You can also create matrices using the commands of the [Matrix-Create] group on the [Action] menu. For information about using these commands, see “2-7 Using the Action Menu”.

Performing Matrix Calculations

This section provides examples of how to perform the most basic types of matrix calcula- tions.

kMatrix Addition, Subtraction, Multiplication, and Division

Example 1:

 

1

1

 

+

 

2

3

 

1

 

 

2

1

 

 

2

 

 

 

u ClassPad Operation

(1)Perform the key operation below in the Main application work area.

9[[b,b][c,b]]+ [[c,d][c,b]]

(2)Tap w.

Example 2:

 

1

1

 

⋅

 

2

3

 

1

 

 

2

1

 

 

2

 

 

 

u ClassPad Operation

(1)Tap ), K, 8, and then input the values for the first matrix.

(2)Tap the area to the right of the input matrix or press the cursor e key to move the cursor to the right of the input matrix. Next, tap *.

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