Appendix A: Functions and Instructions
839
rowNorm()
MATH/Matrix/Norms menu
rowNorm(
matrix
)
⇒
expression
Returns the maximum of the sums of the absolute
values of the elements in the rows in
matrix
.
Note:
All matrix elements must simplify to numbers.
See also
colNorm()
.
rowNorm([-5,6,-7;3,4,9;9,-9,-7])
¸
25
rowSwap()
MATH/Matrix/Row ops menu
rowSwap(
matrix1
,
rIndex1
,
rIndex2
)
⇒
matrix
Returns
matrix1
with rows
rIndex1
and
rIndex2
exchanged.
[1,2;3,4;5,6]
!
Mat
¸
1 2
3 4
5 6
rowSwap(Mat,1,3)
¸
5 6
3 4
1 2
RplcPic
CATALOG
RplcPic
picVar
[
,
row][
,
column
]
Clears the Graph screen and places picture
picVar
at pixel coordinates (
row
,
column
). If you do not want
to clear the screen, use
RclPic
.
picVar
must be a picture data type variable.
row
and
column
, if included, specify the pixel coordinates of
the upper left corner of the picture. Default
coordinates are (0, 0).
Note:
For less than full-screen pictures, only the
area affected by the new picture is cleared.
rref()
MATH/Matrix menu
rref(
matrix1[
,
tol]
)
⇒
matrix
Returns the reduced row echelon form of
matrix1
.
rref([
ë
2,
ë
2,0,
ë
6;1,
ë
1,9,
ë
9;
ë
5,2,4,
ë
4])
¸
1 0 0 66/71
0 1 0
147
71
0 0 1
ë
62/71
Optionally, any matrix element is treated as zero if
its absolute value is less than
tol
. This tolerance is
used only if the matrix has floating-point entries and
does not contain any symbolic variables that have
not been assigned a value. Otherwise,
tol
is ignored.
•
If you use
¥ ¸
or set the mode to
Exact/Approx=APPROXIMATE
, computations
are done using floating-point arithmetic.
•
If
tol
is omitted or not used, the default tolerance
is calculated as:
5
E
ë
14
ù
max(dim(
matrix1
))
ù
rowNorm(
matrix1
)
Note:
See also
ref()
.
rref([a,b,x;c,d,y])
¸
1 0
d
ø
x
-
b
ø
y
a
ø
d
-
b
ø
c
0 1
ë
(c
ø
x
-
a
ø
y)
a
ø
d
-
b
ø
c
Summary of Contents for Titanium TI-89
Page 9: ...Getting Started 6 TI 89 Titanium keys Ë Ì Í Ê ...
Page 34: ...Getting Started 31 2 or D 2 B u s i n e s s D B D B Press Result ...
Page 43: ...Getting Started 40 3 0 D B D D B D Press Result ...
Page 44: ...Getting Started 41 D 2 0 0 2 D B Scroll down to October and press Press Result ...
Page 58: ...Getting Started 55 Example Set split screen mode to TOP BOTTOM Press Result 3 B D ...
Page 70: ...Getting Started 67 ...
Page 175: ...Operating the Calculator 172 From the Keyboard ...
Page 456: ...Tables 453 ...
Page 527: ...Data Matrix Editor 524 ...
