Texas Instruments TITANIUM TI-89 - Manual (Page 801)

Appendix A: Functions and Instructions 801
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
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