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Appendix A: Functions and Instructions 509
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 509 of 132
sum(matrix1[, start[, end]])
⇒
matrix
Returns a row vector containing the sums of
the elements in the columns in
matrix1
.
Start
and
end
are optional. They specify a
range of rows.
sum([1,2,3;4,5,6])
¸
[5 7 9]
sum([1,2,3;4,5,6;7,8,9])
¸
[12 15 18]
sum([1,2,3;4,5,6;7,8,9],2,3)
¸
[11,13,15]
switch()
CATALOG
switch([integer1])
⇒
integer
Returns the number of the active window.
Also can set the active window.
Note:
Window 1
is left or top;
Window 2
is
right or bottom.
If
integer1
= 0, returns the active window
number.
If
integer1
= 1, activates window 1 and
returns the previously active window
number.
If
integer1
= 2, activates window 2 and
returns the previously active window
number.
If
integer1
is omitted, switches windows and
returns the previously active window
number.
integer1
is ignored if the
TI
-
89 / TI
-
92 Plus
is not
displaying a split screen.
switch()
¸
T
(transpose)
MATH/Matrix menu
matrix1
î
⇒
matrix
Returns the complex conjugate transpose of
matrix1
.
[1,2,3;4,5,6;7,8,9]
!
mat1
¸
1
2 3
4 5 6
7 8 9
mat
1
î
¸
1
4 7
2 5 8
3 6 9
[a,b;c,d]
!
mat2
¸
[
a b
c d
]
mat2
î
¸
[
a c
b d
]
[1+
i
,2+
i
;3+
i
,4+
i
]
!
mat3
¸
[
1+
i
2+
i
3+
i
4+
i
]
mat3
î
¸
[
1
ì
i
3
ì
i
2
ì
i
4
ì
i
]