PetscInt main(PetscInt argc,char **args)
{
PetscErrorCode ierr;
PetscMPIInt rank,size;
PetscInt N0=10,N1=10,N2=10,N3=10,N4=10,N=N0*N1*N2*N3*N4;
PetscRandom rdm;
PetscReal enorm;
Vec x,y,z,input,output;
Mat A;
PetscInt DIM, dim[5],vsize;
PetscReal fac;
ierr = PetscInitialize(&argc,&args,(char *)0,help);CHKERRQ(ierr);
ierr = MPI_Comm_size(PETSC_COMM_WORLD, &size);CHKERRQ(ierr);
ierr = MPI_Comm_rank(PETSC_COMM_WORLD, &rank);CHKERRQ(ierr);
if (size!=1)
SETERRQ(PETSC_COMM_WORLD,PETSC_ERR_SUP, "This is a uni-processor example only");
ierr = PetscRandomCreate(PETSC_COMM_SELF, &rdm);CHKERRQ(ierr);
ierr = PetscRandomSetFromOptions(rdm);CHKERRQ(ierr);
ierr = VecCreate(PETSC_COMM_SELF,&input);CHKERRQ(ierr);
ierr = VecSetSizes(input,N,N);CHKERRQ(ierr);
ierr = VecSetFromOptions(input);CHKERRQ(ierr);
ierr = VecSetRandom(input,rdm);CHKERRQ(ierr);
ierr = VecDuplicate(input,&output);
DIM = 5; dim[0] = N0; dim[1] = N1; dim[2] = N2; dim[3] = N3; dim[4] = N4;
ierr = MatCreateFFT(PETSC_COMM_SELF,DIM,dim,MATFFTW,&A);CHKERRQ(ierr);
ierr = MatGetVecs(A,&x,&y);CHKERRQ(ierr);
ierr = MatGetVecs(A,&z,PETSC_NULL);CHKERRQ(ierr);
ierr = VecGetSize(x,&vsize);CHKERRQ(ierr);
printf("The vector size of input from the main routine is %d\n",vsize);
ierr = VecGetSize(z,&vsize);CHKERRQ(ierr);
printf("The vector size of output from the main routine is %d\n",vsize);
ierr = InputTransformFFT(A,input,x);CHKERRQ(ierr);
ierr = MatMult(A,x,y);CHKERRQ(ierr);
ierr = MatMultTranspose(A,y,z);CHKERRQ(ierr);
ierr = OutputTransformFFT(A,z,output);CHKERRQ(ierr);
fac = 1.0/(PetscReal)N;
ierr = VecScale(output,fac);CHKERRQ(ierr);
/*
ierr = VecAssemblyBegin(input);CHKERRQ(ierr);
ierr = VecAssemblyEnd(input);CHKERRQ(ierr);
ierr = VecAssemblyBegin(output);CHKERRQ(ierr);
ierr = VecAssemblyEnd(output);CHKERRQ(ierr);
ierr = VecView(input,PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr);
ierr = VecView(output,PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr);
*/
ierr = VecAXPY(output,-1.0,input);CHKERRQ(ierr);
ierr = VecNorm(output,NORM_1,&enorm);CHKERRQ(ierr);
// if (enorm > 1.e-14){
ierr = PetscPrintf(PETSC_COMM_SELF," Error norm of |x - z| %e\n",enorm);CHKERRQ(ierr);
// }
ierr = VecDestroy(&output);CHKERRQ(ierr);
ierr = VecDestroy(&input);CHKERRQ(ierr);
ierr = VecDestroy(&x);CHKERRQ(ierr);
ierr = VecDestroy(&y);CHKERRQ(ierr);
ierr = VecDestroy(&z);CHKERRQ(ierr);
ierr = MatDestroy(&A);CHKERRQ(ierr);
ierr = PetscRandomDestroy(&rdm);CHKERRQ(ierr);
PetscFinalize();
return 0;
}
PetscInt main(PetscInt argc,char **args)
{
PetscErrorCode ierr;
PetscMPIInt rank,size;
PetscInt N0=3,N1=3,N2=3,N=N0*N1*N2;
PetscRandom rdm;
PetscScalar a;
PetscReal enorm;
Vec x,y,z,input,output;
PetscBool view=PETSC_FALSE,use_interface=PETSC_TRUE;
Mat A;
PetscInt DIM, dim[3],vsize;
PetscReal fac;
ierr = PetscInitialize(&argc,&args,(char *)0,help);CHKERRQ(ierr);
#if defined(PETSC_USE_COMPLEX)
SETERRQ(PETSC_COMM_WORLD,PETSC_ERR_SUP, "This example requires real numbers");
#endif
ierr = MPI_Comm_size(PETSC_COMM_WORLD, &size);CHKERRQ(ierr);
ierr = MPI_Comm_rank(PETSC_COMM_WORLD, &rank);CHKERRQ(ierr);
ierr = PetscRandomCreate(PETSC_COMM_WORLD, &rdm);CHKERRQ(ierr);
ierr = PetscRandomSetFromOptions(rdm);CHKERRQ(ierr);
ierr = VecCreate(PETSC_COMM_WORLD,&input);CHKERRQ(ierr);
ierr = VecSetSizes(input,PETSC_DECIDE,N);CHKERRQ(ierr);
ierr = VecSetFromOptions(input);CHKERRQ(ierr);
ierr = VecSetRandom(input,rdm);CHKERRQ(ierr);
ierr = VecDuplicate(input,&output);
// ierr = VecGetSize(input,&vsize);CHKERRQ(ierr);
// printf("Size of the input Vector is %d\n",vsize);
DIM = 3;
dim[0] = N0; dim[1] = N1; dim[2] = N2;
ierr = MatCreateFFT(PETSC_COMM_WORLD,DIM,dim,MATFFTW,&A);CHKERRQ(ierr);
ierr = MatGetVecs(A,&x,&y);CHKERRQ(ierr);
ierr = MatGetVecs(A,&z,PETSC_NULL);CHKERRQ(ierr);
ierr = VecGetSize(y,&vsize);CHKERRQ(ierr);
printf("The vector size from the main routine is %d\n",vsize);
ierr = InputTransformFFT(A,input,x);CHKERRQ(ierr);
ierr = MatMult(A,x,y);CHKERRQ(ierr);
ierr = MatMultTranspose(A,y,z);CHKERRQ(ierr);
ierr = OutputTransformFFT(A,z,output);CHKERRQ(ierr);
fac = 1.0/(PetscReal)N;
ierr = VecScale(output,fac);CHKERRQ(ierr);
ierr = VecAssemblyBegin(input);CHKERRQ(ierr);
ierr = VecAssemblyEnd(input);CHKERRQ(ierr);
ierr = VecAssemblyBegin(output);CHKERRQ(ierr);
ierr = VecAssemblyEnd(output);CHKERRQ(ierr);
ierr = VecView(input,PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr);
ierr = VecView(output,PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr);
ierr = VecAXPY(output,-1.0,input);CHKERRQ(ierr);
ierr = VecNorm(output,NORM_1,&enorm);CHKERRQ(ierr);
// if (enorm > 1.e-14){
if (!rank)
ierr = PetscPrintf(PETSC_COMM_SELF," Error norm of |x - z| %e\n",enorm);CHKERRQ(ierr);
// }
// ierr = MatGetVecs(A,&z,PETSC_NULL);CHKERRQ(ierr);
// printf("Vector size from ex148 %d\n",vsize);
// ierr = PetscObjectSetName((PetscObject) x, "Real space vector");CHKERRQ(ierr);
// ierr = PetscObjectSetName((PetscObject) y, "Frequency space vector");CHKERRQ(ierr);
// ierr = PetscObjectSetName((PetscObject) z, "Reconstructed vector");CHKERRQ(ierr);
ierr = PetscFinalize();
return 0;
}
PetscInt main(PetscInt argc,char **args)
{
PetscErrorCode ierr;
PetscMPIInt rank,size;
PetscInt N0=2048,N1=2048,N2=3,N3=5,N4=5,N=N0*N1;
PetscRandom rdm;
PetscReal enorm;
Vec x,y,z,input,output;
Mat A;
PetscInt DIM, dim[5],vsize;
PetscReal fac;
PetscScalar one=1,two=2,three=3;
ierr = PetscInitialize(&argc,&args,(char *)0,help);CHKERRQ(ierr);
ierr = MPI_Comm_size(PETSC_COMM_WORLD, &size);CHKERRQ(ierr);
ierr = MPI_Comm_rank(PETSC_COMM_WORLD, &rank);CHKERRQ(ierr);
//#if !defined(PETSC_USE_COMPLEX)
// SETERRQ(PETSC_COMM_WORLD,PETSC_ERR_SUP, "Example for Complex DFT. Your current data type is real");
//#endif
ierr = PetscRandomCreate(PETSC_COMM_WORLD, &rdm);CHKERRQ(ierr);
ierr = PetscRandomSetFromOptions(rdm);CHKERRQ(ierr);
ierr = VecCreate(PETSC_COMM_WORLD,&input);CHKERRQ(ierr);
ierr = VecSetSizes(input,PETSC_DECIDE,N);CHKERRQ(ierr);
ierr = VecSetFromOptions(input);CHKERRQ(ierr);
// ierr = VecSet(input,one);CHKERRQ(ierr);
// ierr = VecSetValue(input,1,two,INSERT_VALUES);CHKERRQ(ierr);
// ierr = VecSetValue(input,2,three,INSERT_VALUES);CHKERRQ(ierr);
// ierr = VecSetValue(input,3,three,INSERT_VALUES);CHKERRQ(ierr);
ierr = VecSetRandom(input,rdm);CHKERRQ(ierr);
// ierr = VecSetRandom(input,rdm);CHKERRQ(ierr);
// ierr = VecSetRandom(input,rdm);CHKERRQ(ierr);
ierr = VecDuplicate(input,&output);
DIM = 2; dim[0] = N0; dim[1] = N1; dim[2] = N2; dim[3] = N3; dim[4] = N4;
ierr = MatCreateFFT(PETSC_COMM_WORLD,DIM,dim,MATFFTW,&A);CHKERRQ(ierr);
ierr = MatGetVecsFFTW(A,&x,&y,&z);CHKERRQ(ierr);
// ierr = MatGetVecs(A,&x,&y);CHKERRQ(ierr);
// ierr = MatGetVecs(A,&z,PETSC_NULL);CHKERRQ(ierr);
ierr = VecGetSize(x,&vsize);CHKERRQ(ierr);
printf("The vector size of input from the main routine is %d\n",vsize);
ierr = VecGetSize(z,&vsize);CHKERRQ(ierr);
printf("The vector size of output from the main routine is %d\n",vsize);
ierr = InputTransformFFT(A,input,x);CHKERRQ(ierr);
ierr = MatMult(A,x,y);CHKERRQ(ierr);
ierr = VecAssemblyBegin(y);CHKERRQ(ierr);
ierr = VecAssemblyEnd(y);CHKERRQ(ierr);
ierr = VecView(y,PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr);
ierr = MatMultTranspose(A,y,z);CHKERRQ(ierr);
ierr = OutputTransformFFT(A,z,output);CHKERRQ(ierr);
fac = 1.0/(PetscReal)N;
ierr = VecScale(output,fac);CHKERRQ(ierr);
ierr = VecAssemblyBegin(input);CHKERRQ(ierr);
ierr = VecAssemblyEnd(input);CHKERRQ(ierr);
ierr = VecAssemblyBegin(output);CHKERRQ(ierr);
ierr = VecAssemblyEnd(output);CHKERRQ(ierr);
// ierr = VecView(input,PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr);
// ierr = VecView(output,PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr);
ierr = VecAXPY(output,-1.0,input);CHKERRQ(ierr);
ierr = VecNorm(output,NORM_1,&enorm);CHKERRQ(ierr);
// if (enorm > 1.e-14){
ierr = PetscPrintf(PETSC_COMM_SELF," Error norm of |x - z| %e\n",enorm);CHKERRQ(ierr);
// }
ierr = VecDestroy(&output);CHKERRQ(ierr);
ierr = VecDestroy(&input);CHKERRQ(ierr);
ierr = VecDestroy(&x);CHKERRQ(ierr);
ierr = VecDestroy(&y);CHKERRQ(ierr);
ierr = VecDestroy(&z);CHKERRQ(ierr);
ierr = MatDestroy(&A);CHKERRQ(ierr);
ierr = PetscRandomDestroy(&rdm);CHKERRQ(ierr);
PetscFinalize();
return 0;
}
