52
Matrices
In addition to those in the Matrix
MATH
menu, the following
matrix operations are allowed. Dimensions must be correct:
•
matrix
+
matrix
•
matrix
–
matrix
•
matrix
×
matrix
• Scalar multiplication (for example, 2 ×
matrix
)
•
matrix
×
vector
(
vector
will be interpreted as a column
vector)
%
t
NAMES
%
t
displays the matrix
NAMES
menu, which shows
the dimensions of the matrices and lets you use them in
calculations.
%
t
MATH
%
t
"
displays the matrix
MATH
menu, which lets
you perform the following operations:
%
t
EDIT
%
t
!
displays the matrix
EDIT
menu, which lets
you define or edit matrix [A], [B], or [C].
1: [A]
Definable matrix A
2: [B]
Definable matrix B
3: [C]
Definable matrix C
4: [Ans]
Last matrix result (displayed as
[Ans]=
m
×
n
)
or
last vector result (displayed as
[Ans] dim=
n
). Not
editable.
5: [I2]
2×2 identity matrix (not editable)
6: [I3]
3×3 identity matrix (not editable)
1: Determinant
Syntax:
det(
matrix
)
2:
T
Transpose Syntax:
matrix
T
3: Inverse
Syntax:
squarematrix
–1
4: ref reduced
Row echelon form, syntax:
ref(
matrix
)
5: rref reduced
Reduced row echelon form,
syntax:
rref(
matrix
)
