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lusolve(G) Scilab Function lusolve(G)
NAME
lusolve - sparse linear system solver
CALLING SEQUENCE
lusolve(hand,b)
lusolve(A,b)
PARAMETERS
b : full real matrix
A : real square sparse invertible matrix
hand : handle to a previously computed sparse lu factors (output of lufact)
DESCRIPTION
x=lusolve(hand,b) solves the sparse linear system A*x = b.
[hand,rk]=lufact(A) is the output of lufact.
x=lusolve(A,b) solves the sparse linear system
EXAMPLE
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
SEE ALSO
sparse, lufact, slash, backslash
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