Appendix A: Functions and Instructions
857
Sum (Sigma)
See
G
()
, page 881.
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()
¸
Summary of Contents for Titanium TI-89
Page 9: ...Getting Started 6 TI 89 Titanium keys Ë Ì Í Ê ...
Page 34: ...Getting Started 31 2 or D 2 B u s i n e s s D B D B Press Result ...
Page 43: ...Getting Started 40 3 0 D B D D B D Press Result ...
Page 44: ...Getting Started 41 D 2 0 0 2 D B Scroll down to October and press Press Result ...
Page 58: ...Getting Started 55 Example Set split screen mode to TOP BOTTOM Press Result 3 B D ...
Page 70: ...Getting Started 67 ...
Page 175: ...Operating the Calculator 172 From the Keyboard ...
Page 456: ...Tables 453 ...
Page 527: ...Data Matrix Editor 524 ...
