Texas Instruments Voyage 200, Руководство пользователя

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884 Appendix A: Functions and Instructions
subMat()
CATALOG
subMat(
matrix1
[ ,
startRow
] [ ,
startCol
] [ ,
endRow
]
[ ,
endCol
] )
⇒
⇒ ⇒
⇒
matrix
Returns the specified submatrix of matrix1 .
Defaults:
startRow
=1,
startCol
=1,
endRow
=last
row,
endCol
=last column.
[1,2,3;4,5,6;7,8,9]
!
m1
¸






1 2 3
4 5 6
7 8 9
subMat(m1,2,1,3,2)
¸
[
4 5
7 8
]
subMat(m1,2,2)
¸
[
5 6
8 9
]
Sum (Sigma)
See
G
() , page 908.
sum()
MATH/List menu
sum(
list
[
, start
[
, end
]])
⇒ ⇒ ⇒ ⇒
expression
Returns the sum of the elements in
list
.
Start
and
end
are optional. They specify a range of
elements.
sum({1,2,3,4,5})
¸
15
sum({a,2a,3a})
¸
6
ø
a
sum(seq(n,n,1,10))
¸
55
sum({1,3,5,7,9},3)
¸
21
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 Titanium/Voyage™ 200 is not displaying a
split screen.
switch()
¸