Texas Instruments TI-86 - Manual (Page 342)

330
Chapter 20: A to Z Function and Instruction Reference
20ATOZ.DOC TI-86, Chap 20, US English Bob Fedorisko Revised: 02/13/01 2:42 PM Printed: 02/13/01 3:05 PM Page 330 of 118
P2Reg
STAT CALC menu
Built-in equation variables
such as y1, r1, and xt1 are
case-sensitive. Do not use
Y1, R1, and XT1.
P2Reg xList , yList , frequencyList , equationVariable
Performs a second order polynomial regression using
real data pairs in xList and yList and frequencies in
frequencyList
. The regression equation is stored to
equationVariable , which must be a built-in equation
variable such as y1 , r1 , and xt1 . The equation’s
coefficients always are stored as a list to built-in
variable
PRegC .
Values used for xList, yList, and frequencyList are
stored automatically to built-in variables
xStat , yStat ,
and fStat , respectively. The regression equation is
stored also to built-in equation variable RegEq .
P2Reg xList , yList , equationVariable
Uses frequencies of 1.
P2Reg xList , yList , frequencyList
Stores the regression equation to RegEq only.
In Func graphing mode:
{1,2,3,4,5,6}¶L1 b
{1 2 3 4 5 6}
{ L 2,6,11,23,29,47}¶L2 b
{ L 2 6 11 23 29 47}
P2Reg L1,L2,y1 b
Plot1(1,L1,L2) b Done
ZData b
P2Reg xList , yList
Uses frequencies of 1, and stores the regression
equation to
RegEq only.
P2Reg equationVariable
Uses xStat , yStat , and fStat for xList, yList, and
frequencyList , respectively. These built-in variables
must contain valid data of the same dimension;
otherwise, an error occurs. The regression equation is
stored to equationVariable and
RegEq .