Operation Manual

Matrices 10-11
8210MTRX.DOC TI-82, Chapter 10, English Bob Fedorisko Revised: 02/09/01 9:18 AM Printed:
02/09/01 12:38 PM Page 11 of 14
round(
round(
(
MATH NUM
menu) returns a matrix. It rounds every element in
matrix
to
#decimals
. If
#decimals
is omitted, the elements are rounded to
10 digits.
round(
matrix
,
#decimals
)
round(
matrix
)
-1
(Inverse)
Use the
-1
function (
—
) to invert a matrix (
^
M
1
is not valid).
matrix
must
be square. The determinant cannot equal zero.
matrix
-1
Powers
To raise a matrix to a power,
matrix
must be square. You may use
2
,
3
, or
^
n
(
n
between
0
and
255
).
matrix
2
matrix
3
matrix
^
power
Relational Operations
To compare two matrices using the relational operations
=
and
ƒ
, they must
have the same dimensions.
=
and
ƒ
compare
matrixA
and
matrixB
on an
element-by-element basis. The other relational operations are not valid with
matrices.
matrixA
=
matrixB
returns
1
if every comparison is true; it returns
0
if any
comparison is false.
matrixA
ƒ
matrixB
returns
1
if at least one comparison is false.
iPart, fPart, int
iPart
,
fPart
, and
int
(
MATH NUM
menu) return a matrix containing the
integer part, fractional part, or greatest integer of each element of
matrix
.
iPart
matrix
fPart
matrix
int
matrix