1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
|
.TH lusolve G "April 1993" "Scilab Group" "Scilab Function"
.so ../sci.an
.SH NAME
lusolve - sparse linear system solver
.SH CALLING SEQUENCE
.nf
lusolve(hand,b)
lusolve(A,b)
.fi
.SH PARAMETERS
.TP
b
: full real matrix
.TP
A
: real square sparse invertible matrix
.TP
hand
: handle to a previously computed sparse lu factors (output of lufact)
.SH DESCRIPTION
.Vb x=lusolve(hand,b)
solves the sparse linear system \fVA*x = b\fR.
.LP
\fV[hand,rk]=lufact(A)\fR is the output of lufact.
.LP
.Vb x=lusolve(A,b) solves the sparse linear system \fVA*x = b\fR.
.SH EXAMPLE
.nf
non_zeros=[1,2,3,4];rows_cols=[1,1;2,2;3,3;4,4];
sp=sparse(rows_cols,non_zeros);
[h,rk]=lufact(sp);x=lusolve(h,[1;1;1;1]);ludel(h)
rk,sp*x
non_zeros=[1,2,3,4];rows_cols=[1,1;2,2;3,3;4,4];
sp=sparse(rows_cols,non_zeros);
x=lusolve(sp,-ones(4,1));
sp*x
.fi
.SH SEE ALSO
sparse, lufact, slash, backslash
|
