Operation Manual

10-10 Matrices
8210MTRX.DOC TI-82, Chapter 10, English Bob Fedorisko Revised: 02/09/01 9:18 AM Printed:
02/09/01 12:38 PM Page 10 of 14
Matrix Math Functions
You can use many of the math functions on the keyboard, MATH MATH menu,
and the MATH NUM menu with matrices. However, the dimensions must be
appropriate.
+ (Add), – (Subtract)
To add (
Ã
) or subtract (
¹
) matrices, the dimensions must be the same.
The answer is a matrix in which the elements are the sum or difference of
the individual elements.
matrixA
+
matrixB
matrixA
–
matrixB
…
(
Multiply)
To multiply (
¯
) two matrices together, the column dimension of
matrixA
must match the row dimension of
matrixB
.
matrixA
…
matrixB
Multiplying a
matrix
by a
value
or a
value
by a
matrix
returns a matrix in
which each element of
matrix
is multiplied by
value
.
matrix
…
value
value
…
matrix
M
(Negate)
Negating a matrix (
Ì
) returns a matrix in which the sign of every element
is changed (reversed).
M
matrix
abs
abs
(absolute value,
y
ã
ABS
ä
) returns a matrix containing the absolute
value of each element of
matrix
.
abs
matrix