Texas Instruments PLUS TI-89 - Manual (Page 445)

428 Appendix A: Functions and Instructions
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 428 of 132
CubicReg MATH/Statistics/Regressions menu
CubicReg list1 , list2 [ , [ list3 ] [, list4 , list5 ] ]
Calculates the cubic polynomial regression
and updates all the statistics variables.
All the lists must have equal dimensions
except for
list5 .
list1 represents xlist.
list2 represents ylist.
list3 represents frequency.
list4 represents category codes.
list5 represents category include list.
Note: list1 through list4 must be a variable
name or c1–c99 (columns in the last data
variable shown in the Data/Matrix Editor).
list5 does not have to be a variable name and
cannot be c1–c99.
In function graphing mode.
{0,1,2,3}! L1 ¸ {0 1 2 3}
{0,2,3,4}! L2 ¸ {0 2 3 4}
CubicReg L1,L2 ¸ Done
ShowStat ¸
¸
regeq(x) "y1(x) ¸ Done
NewPlot 1,1,L1,L2 ¸ Done
¥ %
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.