Texas Instruments TI-89 Manual Book page 510

rowNorm ()
MATH/Matrix/Norms menu
rowNorm(matrix)
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
rowSwap ()
MATH/Matrix/Row ops menu
rowSwap(matrix1, rIndex1, rIndex2)
Returns
exchanged.
rIndex2
RplcPic
CATALOG
RplcPic picVar[, row][, column]
Clears the Graph screen and places picture
at pixel coordinates (
picVar
you do not want to clear the screen, use
RclPic .
must be a picture data type variable.
picVar
and
row
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])
Returns the reduced row echelon form of
.
matrix1
Optionally, any matrix element is treated as
zero if its absolute value is less than
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,
If you use ¥ ¸ or set the mode to
Exact/Approx=APPROXIMATE
are done using floating-point arithmetic.
If is omitted or not used, the default
tol
tolerance is calculated as:
5 ë 14 ù max(dim(matrix1))
E
ù rowNorm(matrix1)
Note: See also
expression
.
colNorm()
with rows
matrix1 rIndex1
,
row column
, if included, specify the pixel
column
matrix
is ignored.
tol
, computations
.
ref()
rowNorm([-5,6,-7;3,4,9;9,-9,-7])
¸
[1,2;3,4;5,6]! Mat ¸
matrix
and
rowSwap(Mat,1,3) ¸
). If
rref([ë 2,ë 2,0,ë 6;1,ë 1,9,ë 9;
ë 5,2,4,ë 4]) ¸
rref([a,b,x;c,d,y]) ¸
. This
tol
Appendix A: Functions and Instructions
25
1 2
3 4
5 6
5 6
3 4
1 2
1 0 0 66/71
147
0 1 0
71
ë 62/71
0 0 1
dø x-bø y
1 0
aø d-bø c
ë (cø x-aø y)
0 1
aø d-bø c
493