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
matrix1î ⇒ 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
1î¸
1
4 7
2 5 8
3 6 9
[a,b;c,d]!mat2 ¸[a b
c d]
mat2î¸[a c
b d]
[1+i,2+i;3+i,4+i]!mat3 ¸
[1+i 2+i
3+i 4+i]
mat3î¸[1ìi 3ìi
2ìi 4ìi]