kEditing the Elements of a Matrix

Press Aj2(Edit) and then specify the name (A, B, or

C)of the matrix you want to edit to display a screen for editing the elements of the matrix.

kMatrix Addition, Subtraction, and

Multiplication

Use the procedures described below to add, subtract, and multiply matrices.

• Example: To multiply Matrix A =

[

1

2

]

by

 

 

 

4

0

 

 

 

 

 

 

–2 5

 

 

 

 

]

 

 

 

 

 

 

[

3

–8

5

Matrix B = [–12–40

13 ]

 

 

(

 

12–4

–200

12–1

)

(Matrix A 32)

A j 1(Dim) 1(A) 3 = 2 =

(Element input) 1 = 2 = 4 = 0 = D 2 = 5 = t

(Matrix B 23) A j 1(Dim) 2(B) 2 = 3 =

(Element input)

D1 = 0 = 3 = 2 = D 4 = 1 = t

(MatAMatB)

A j3(Mat) 1(A) -

 

A j3(Mat) 2(B) =

•An error occurs if you try to add, subtract matrices whose dimensions are different from each other, or multiply a matrix whose number of columns is different from that of the matrix by which you are multiplying it.

kCalculating the Scalar Product of a

Matrix

Use the procedure shown below to obtain the scalar product (fixed multiple) of a matrix.

 

[

2

–1

]

[

]

• Example: Multiply Matrix C =

 

–5

3

 

by 3.(

–15 9 )

E-16