1c4762a1bSJed Brown 2c4762a1bSJed Brown static char help[] = "Tests Cholesky factorization for a SBAIJ matrix, (bs=2).\n"; 3c4762a1bSJed Brown /* 4c4762a1bSJed Brown This code is modified from the code contributed by JUNWANG@uwm.edu on Apr 13, 2007 5c4762a1bSJed Brown */ 6c4762a1bSJed Brown 7c4762a1bSJed Brown #include <petscmat.h> 8c4762a1bSJed Brown 9c4762a1bSJed Brown int main(int argc,char **args) 10c4762a1bSJed Brown { 11c4762a1bSJed Brown Mat mat,fact,B; 12c4762a1bSJed Brown PetscInt ind1[2],ind2[2]; 13c4762a1bSJed Brown PetscScalar temp[4]; 14c4762a1bSJed Brown PetscInt nnz[3]; 15c4762a1bSJed Brown IS perm,colp; 16c4762a1bSJed Brown MatFactorInfo info; 17c4762a1bSJed Brown PetscMPIInt size; 18c4762a1bSJed Brown 19*b122ec5aSJacob Faibussowitsch CHKERRQ(PetscInitialize(&argc,&args,0,help)); 205f80ce2aSJacob Faibussowitsch CHKERRMPI(MPI_Comm_size(PETSC_COMM_WORLD,&size)); 212c71b3e2SJacob Faibussowitsch PetscCheckFalse(size != 1,PETSC_COMM_WORLD,PETSC_ERR_SUP,"This is a uniprocessor example only!"); 22c4762a1bSJed Brown 23c4762a1bSJed Brown nnz[0]=2;nnz[1]=1;nnz[2]=1; 245f80ce2aSJacob Faibussowitsch CHKERRQ(MatCreateSeqSBAIJ(PETSC_COMM_SELF,2,6,6,0,nnz,&mat)); 25c4762a1bSJed Brown 26c4762a1bSJed Brown ind1[0]=0;ind1[1]=1; 27c4762a1bSJed Brown temp[0]=3;temp[1]=2;temp[2]=0;temp[3]=3; 285f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetValues(mat,2,ind1,2,ind1,temp,INSERT_VALUES)); 29c4762a1bSJed Brown ind2[0]=4;ind2[1]=5; 30c4762a1bSJed Brown temp[0]=1;temp[1]=1;temp[2]=2;temp[3]=1; 315f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetValues(mat,2,ind1,2,ind2,temp,INSERT_VALUES)); 32c4762a1bSJed Brown ind1[0]=2;ind1[1]=3; 33c4762a1bSJed Brown temp[0]=4;temp[1]=1;temp[2]=1;temp[3]=5; 345f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetValues(mat,2,ind1,2,ind1,temp,INSERT_VALUES)); 35c4762a1bSJed Brown ind1[0]=4;ind1[1]=5; 36c4762a1bSJed Brown temp[0]=5;temp[1]=1;temp[2]=1;temp[3]=6; 375f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetValues(mat,2,ind1,2,ind1,temp,INSERT_VALUES)); 38c4762a1bSJed Brown 395f80ce2aSJacob Faibussowitsch CHKERRQ(MatAssemblyBegin(mat,MAT_FINAL_ASSEMBLY)); 405f80ce2aSJacob Faibussowitsch CHKERRQ(MatAssemblyEnd(mat,MAT_FINAL_ASSEMBLY)); 41c4762a1bSJed Brown 425f80ce2aSJacob Faibussowitsch CHKERRQ(MatDuplicate(mat,MAT_SHARE_NONZERO_PATTERN,&B)); 43c4762a1bSJed Brown ind1[0]=0;ind1[1]=1; 44c4762a1bSJed Brown temp[0]=3;temp[1]=2;temp[2]=0;temp[3]=3; 455f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetValues(mat,2,ind1,2,ind1,temp,INSERT_VALUES)); 46c4762a1bSJed Brown ind2[0]=4;ind2[1]=5; 47c4762a1bSJed Brown temp[0]=1;temp[1]=1;temp[2]=2;temp[3]=1; 485f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetValues(mat,2,ind1,2,ind2,temp,INSERT_VALUES)); 49c4762a1bSJed Brown ind1[0]=2;ind1[1]=3; 50c4762a1bSJed Brown temp[0]=4;temp[1]=1;temp[2]=1;temp[3]=5; 515f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetValues(mat,2,ind1,2,ind1,temp,INSERT_VALUES)); 52c4762a1bSJed Brown ind1[0]=4;ind1[1]=5; 53c4762a1bSJed Brown temp[0]=5;temp[1]=1;temp[2]=1;temp[3]=6; 545f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetValues(mat,2,ind1,2,ind1,temp,INSERT_VALUES)); 55c4762a1bSJed Brown 565f80ce2aSJacob Faibussowitsch CHKERRQ(MatAssemblyBegin(mat,MAT_FINAL_ASSEMBLY)); 575f80ce2aSJacob Faibussowitsch CHKERRQ(MatAssemblyEnd(mat,MAT_FINAL_ASSEMBLY)); 58c4762a1bSJed Brown 595f80ce2aSJacob Faibussowitsch CHKERRQ(PetscPrintf(PETSC_COMM_WORLD,"mat: \n")); 605f80ce2aSJacob Faibussowitsch CHKERRQ(MatView(mat,PETSC_VIEWER_STDOUT_SELF)); 61c4762a1bSJed Brown 62c4762a1bSJed Brown /* begin cholesky factorization */ 635f80ce2aSJacob Faibussowitsch CHKERRQ(MatGetOrdering(mat,MATORDERINGNATURAL,&perm,&colp)); 645f80ce2aSJacob Faibussowitsch CHKERRQ(ISDestroy(&colp)); 65c4762a1bSJed Brown 66c4762a1bSJed Brown info.fill=1.0; 675f80ce2aSJacob Faibussowitsch CHKERRQ(MatGetFactor(mat,MATSOLVERPETSC,MAT_FACTOR_CHOLESKY,&fact)); 685f80ce2aSJacob Faibussowitsch CHKERRQ(MatCholeskyFactorSymbolic(fact,mat,perm,&info)); 695f80ce2aSJacob Faibussowitsch CHKERRQ(MatCholeskyFactorNumeric(fact,mat,&info)); 70c4762a1bSJed Brown 715f80ce2aSJacob Faibussowitsch CHKERRQ(ISDestroy(&perm)); 725f80ce2aSJacob Faibussowitsch CHKERRQ(MatDestroy(&mat)); 735f80ce2aSJacob Faibussowitsch CHKERRQ(MatDestroy(&fact)); 745f80ce2aSJacob Faibussowitsch CHKERRQ(MatDestroy(&B)); 75*b122ec5aSJacob Faibussowitsch CHKERRQ(PetscFinalize()); 76*b122ec5aSJacob Faibussowitsch return 0; 77c4762a1bSJed Brown } 78