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492 Appendix A: Functions and Instructions
8992APPA.DOC TI-89 / TI-92 Plus: Appendix A (US English) Susan Gullord Revised: 02/23/01 1:48 PM Printed: 02/23/01 2:21 PM Page 492 of 132
rotate(list1
[
,#ofRotations
]
)
⇒
list
Returns a copy of
list1
rotated right or left by
#of Rotations
elements. Does not alter
list1
.
If
#of Rotations
is positive, the rotation is to
the left. If
#of Rotations
is negative, the
rotation is to the right. The default is
ë
1
(rotate right one element).
In Dec base mode:
rotate({1,2,3,4})
¸
{4 1 2 3}
rotate({1,2,3,4},
ë
2)
¸
{3 4 1 2}
rotate({1,2,3,4},1)
¸
{2 3 4 1}
rotate(string1
[
,#ofRotations
]
)
⇒
string
Returns a copy of
string1
rotated right or left
by
#of Rotations
characters. Does not alter
string1
.
If
#of Rotations
is positive, the rotation is to
the left. If
#of Rotations
is negative, the
rotation is to the right. The default is
ë
1
(rotate right one character).
rotate("abcd")
¸
"dabc"
rotate("abcd",
ë
2)
¸
"cdab"
rotate("abcd",1)
¸
"bcda"
round()
MATH/Number menu
round(expression1
[
, digits
]
)
⇒
expression
Returns the argument rounded to the
specified number of digits after the decimal
point.
digits
must be an integer in the range 0–12. If
digits
is not included, returns the argument
rounded to 12 significant digits.
Note:
Display digits mode may affect how
this is displayed.
round(1.234567,3)
¸
1.235
round(list1
[
, digits
]
)
⇒
list
Returns a list of the elements rounded to the
specified number of digits.
round({p,‡(2),ln(2)},4)
¸
{3.1416 1.4142 .6931}
round(matrix1
[
, digits
]
)
⇒
matrix
Returns a matrix of the elements rounded to
the specified number of digits.
round([ln(5),ln(3);p,
e
^(1)],1)
¸
[
1.6 1.1
3.1 2.7
]
rowAdd()
MATH/Matrix/Row ops menu
rowAdd(matrix1, rIndex1, rIndex2)
⇒
matrix
Returns a copy of
matrix1
with row
rIndex2
replaced by the sum of rows
rIndex1
and
rIndex2
.
rowAdd([3,4;
ë
3,
ë
2],1,2)
¸
[]
3 4
0 2
rowAdd([a,b;c,d],1,2)
¸
[
a
a+c
b
b+d
]
rowDim()
MATH/Matrix/Dimensions menu
rowDim(matrix)
⇒
expression
Returns the number of rows in
matrix
.
Note:
See also
colDim()
.
[1,2;3,4;5,6]
!
M1
¸
1 2
3 4
5 6
row
d
im
(
M
1)
¸
3