Texas Instruments Titanium TI-89, User Manual

Page: 814 / 977

Appendix A: Functions and Instructions 811
LinReg
MATH/Statistics/Regressions menu
LinReg list1 , list2
[
, [ list3 ] [ , list4 , list5 ]
]
Calculates the linear regression and updates all the
system 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.
In function graphing mode:
{0,1,2,3,4,5,6}
!
L1
¸
{0 1 2 ... }
{0,2,3,4,3,4,6} ! L2 ¸
{0 2 3 ... }
LinReg L1,L2
¸
Done
ShowStat
¸
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.
¸
Regeq(x)
"
y1(x)
¸
Done
NewPlot 1,1,L1,L2
¸
Done
¥ %
@
list()
MATH/List menu
list
( list1)
⇒
list
Returns a list containing the differences between
consecutive elements in
list1 . Each element of list1 is
subtracted from the next element of list1 . The
resulting list is always one element shorter than the
original
list1 .
@
list({20,30,45,70})
¸
{10,15,25}
list
4
mat()
MATH/List menu
list
4
mat( list [ , elementsPerRow ] )
⇒
matrix
Returns a matrix filled row-by-row with the elements
from
list
.
elementsPerRow
, if included, specifies the number of
elements per row. Default is the number of elements
in
list
(one row).
If
list
does not fill the resulting matrix, zeros are
added.
list
4
mat({1,2,3})
¸
[1 2 3]
list
4
mat({1,2,3,4,5},2)
¸






1 2
3 4
5 0
ln() @
2 x
key
H
x
key
ln(
expression1
)
⇒
expression
ln( list1 )
⇒
list
Returns the natural logarithm of the argument.
For a list, returns the natural logarithms of the
elements.
ln(2.0)
¸
.693
...
If complex format mode is
REAL
:
ln({
ë
3,1.2,5})
¸
Error: Non-real result
If complex format mode is
RECTANGULAR
:
ln({ ë 3,1.2,5}) ¸
{ln(3) +
p ø
i .182 ... ln(5)}