Cubicreg, Cumsum(), Custmoff – Texas Instruments PLUS TI-89 User Manual

Page 445: Custmon

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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.

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