File: chsolve.cat

package info (click to toggle)
scilab 2.4-1
  • links: PTS
  • area: non-free
  • in suites: potato, slink
  • size: 55,196 kB
  • ctags: 38,019
  • sloc: ansic: 231,970; fortran: 148,976; tcl: 7,099; makefile: 4,585; sh: 2,978; csh: 154; cpp: 101; asm: 39; sed: 5
file content (33 lines) | stat: -rw-r--r-- 761 bytes parent folder | download 
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
 

chsolve(G)                     Scilab Function                     chsolve(G)
NAME
  chsolve - sparse Cholesky solver

CALLING SEQUENCE
  sol=chsolve(spcho,rhs)

PARAMETERS

  spcho
       : list containing the Cholesky factors in coded form returned by
       chfact

  rhs, sol
       : full column vectors

DESCRIPTION
  sol=chsolve(spcho,rhs) computes the solution of sol=A*rhs, with A a sym-
  metric sparse positive definite matrix. This function is based on the Ng-
  Peyton programs (ORNL). See the Fortran programs for a complete description
  of the variables in spcho.

EXAMPLE
  A=sprand(20,20,0.1);
  A=A*A'+eye;
  spcho=chfact(A);
  sol=(1:20)';rhs=A*sol;
  spcho=chfact(A);
  chsolve(spcho,rhs)

SEE ALSO
  chfact, sparse, lufact, luget, spchol