Texas Instruments TITANIUM TI-89 - Manual (Page 802)

802 Appendix A: Functions and Instructions
cumSum() MATH/List menu
cumSum( list1 )
⇒ ⇒ ⇒ ⇒ list
Returns a list of the cumulative sums of the
elements in
list1 , starting at element 1.
cumSum({1,2,3,4}) ¸
{1 3 6 10}
cumSum( matrix1 )
⇒ ⇒ ⇒ ⇒ matrix
Returns a matrix of the cumulative sums of the
elements in
matrix1 . Each element is the
cumulative sum of the column from top to
bottom.
[1,2;3,4;5,6]! m1 ¸





 1 2
3 4
5 6
cumSum(m1) ¸





 1 2
4 6
9 12
CustmOff CATALOG
CustmOff
Removes a custom toolbar.
CustmOn and CustmOff enable a program to
control a custom toolbar. Manually, you can press
2 ¾ to toggle a custom toolbar on and
off. Also, a custom toolbar is removed
automatically when you change applications.
See Custom program listing example.
CustmOn CATALOG
CustmOn
Activates a custom toolbar that has already been
set up in a
Custom...EndCustm block.
CustmOn and CustmOff enable a program to
control a custom toolbar. Manually, you can press
2 ¾ to toggle a custom toolbar on and
off.
See Custom program listing example.
Custom 2 ¾ key
Custom
block
EndCustm
Sets up a toolbar that is activated when you press
2 ¾. It is very similar to the
ToolBar
instruction except that Title and Item statements
cannot have labels.
block can be either a single statement or a series
of statements separated with the “:” character.
Note: 2 ¾ acts as a toggle. The first
instance invokes the menu, and the second
instance removes the menu. The menu is removed
also when you change applications.
Program listing:
:Test()
:Prgm
:Custom
:Title "Lists"
:Item "List1"
:Item "Scores"
:Item "L3"
:Title "Fractions"
:Item "f(x)"
:Item "h(x)"
:Title "Graph"
:EndCustm
:EndPrgm