108
Alphabetical Listing
Loop
Catalog >
Loop
Block
EndLoop
Repeatedly executes the statements in
Block
. Note that the loop will be executed
endlessly, unless a
Goto
or
Exit
instruction
is executed within
Block
.
Block
is a sequence of statements
separated with the “:” character.
Note for entering the example:
For
instructions on entering multi-line program
and function definitions, refer to the
Calculator section of your product
guidebook.
LU
Catalog >
LU
Matrix
,
lMatrix
,
uMatrix
,
pMatrix
[,Tol]
Calculates the Doolittle LU (lower-upper)
decomposition of a real or complex matrix.
The lower triangular matrix is stored in
lMatrix
, the upper triangular matrix in
uMatrix
, and the permutation matrix
(which describes the row swaps done
during the calculation) in
pMatrix
.
lMatrix
•
uMatrix
=
pMatrix
•
matrix
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
Auto or
Approximate
mode to Approximate,
computations are done using floating-
point arithmetic.
•
If
Tol
is omitted or not used, the default
tolerance is calculated as:
5E
⁻
14
•
max(dim(
Matrix
))
•
rowNorm
(
Matrix
)
Содержание TI-Nspire CAS
Страница 4: ...4 Service and Warranty Information 249 Index 251 ...
Страница 248: ...248 ...
Страница 250: ...250 ...