User Manual

2-51
• Calculation precision is affected for matrices whose determinant is near zero.
• A matrix being inverted must satisfy the conditions shown below.
A A
–1
= A
–1
A = E =
1 0
0 1
The following shows the formula used to invert Matrix A into inverse matrix A
–1
.
A =
a b
c d
A
–1
=
1
ad – bc
d–b
–c a
Note that ad – bc ≠ 0.
u Squaring a Matrix [ x
2
]
Example To square the following matrix:
Matrix A =
K2(MAT) 1(Mat) av(A) xw
u Raising a Matrix to a Power [^]
Example To raise the following matrix to the third power:
Matrix A =
K2(MAT) 1(Mat) av(A)
Mdw
• For matrix power calculations, calculation is possible up to a power of 32766.
u Determining the Absolute Value, Integer Part, Fraction Part, and Maximum
Integer of a Matrix
[OPTN] - [NUM] - [Abs]/[Frac]/[Int]/[Intg]
Example To determine the absolute value of the following matrix:
Matrix A =
K6( g) 4(NUM) 1(Abs)
K2(MAT)1(Mat)av(A)w
• The “Abs” command can be used to obtain the absolute value of a vector element.
1 2
3 4
1 2
3 4
1 –2
–3 4