Texas Instruments TI-89 Guide Book

Appendix A: Functions and Instructions 463
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 463 of 132
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.
list4mat({1,2,3})
¸
[1 2 3]
list4mat({1,2,3,4,5},2)
¸




1
2
3 4
5 0
@
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})
¸
{1
0,
1
5,25
}
ln()
TI
-
89:
2x
key TI
-
92 Plus:
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-rea
l
resu
l
t
If complex format mode is
RECTANGULAR
:
ln({
ë
3,1.2,5})
¸
{ln(3) + p
ø
i
.182
...
ln(5)}
ln(
squareMatrix1
)
⇒
squareMatrix
Returns the matrix natural logarithm of
squareMatrix1
. This is
not
the same as
calculating the natural logarithm of each
element. For information about the
calculation method, refer to
cos()
on.
squareMatrix1
must be diagonalizable. The
result always contains floating-point
numbers.
In Radian angle mode and Rectangular
complex format mode:
ln([1,5,3;4,2,1;6,
ë
2,1])
¸






1.831…+1.734…
ø
i
.009…
ì
1.490…
ø
i
…
.448…
ì
.725…
ø
i
1.064…+.623
ø
i
…
ë
.266…
ì
2.083…
ø
i
1.124…+1.790…
ø
i
…

Texas Instruments TI-89 Specifications

General

Display size (HxV)	100 x 160 mm
Memory type	639K FLASH ROM, 188K bytes RAM
Compatible operating systems	Operating System 2.09
Battery type	AAA