int main(){vsip_init((void*)0);
{
int i,j, solretval=0;
vsip_cmview_f *A = vsip_cmcreate_f(M,N,VSIP_COL,0);
vsip_cmview_f *X = vsip_cmcreate_f(M,NB,VSIP_ROW,0);
/* Nullify the data-space */
for (i=0; i < vsip_cmgetcollength_f(A); i++)
for(j=0; j < vsip_cmgetrowlength_f(A); j++)
vsip_cmput_f(A,i,j,vsip_cmplx_f(0,0));
for (i=0; i < vsip_cmgetcollength_f(X); i++)
for(j=0; j < vsip_cmgetrowlength_f(X); j++)
vsip_cmput_f(X,i,j,vsip_cmplx_f(0,0));
/* Initialise matrix A */
for (i=0; i<M; i++)
for (j = 0; j < N; j++)
if(i == j)
vsip_cmput_f(A,i,j,vsip_cmplx_f(M+1, 0));
else if(i > j)
vsip_cmput_f(A,i,j, vsip_cmplx_f(1,1));
else if(i < j)
vsip_cmput_f(A,i,j,vsip_cmplx_f(1,-1));
{int i,j;
printf("A matrix\nA = [\n");
for(i=0; i<M; i++)
{
for(j=0; j< N; j++)
printf("%6.2f+%6.2fi%s",
vsip_real_f(vsip_cmget_f(A,i,j)),
vsip_imag_f(vsip_cmget_f(A,i,j)),(j == N-1) ? "":",");
(i == M - 1) ? printf("]\n") : printf(";\n");
}
}
{ int j, k;
vsip_cvview_f *y = NULL;
vsip_cvview_f *x;
vsip_vview_f *yr = NULL, *yi = NULL;
vsip_length L = NB;
vsip_length p = M;
for(k=0; k<L; k++)
{
x = vsip_cmcolview_f(X,k);
for (j=0; j<p; j++)
{
y = vsip_cmrowview_f(A,j);
yr = vsip_vrealview_f(y);
yi = vsip_vimagview_f(y);
vsip_cvput_f(x,j, vsip_cmplx_f((double)(k+1)*(vsip_vsumval_f(yr)),
(double) (k+1)*(vsip_vsumval_f(yi))));
/* vsip_vput_f(x,j,(vsip_vsumval_f(y)));*/
vsip_cvdestroy_f(y);
vsip_vdestroy_f(yr);
vsip_vdestroy_f(yi);
}
vsip_cvdestroy_f(x);
}
}
{int i,j;
printf("rhs matrix\nB = [\n");
for(i=0; i<NN; i++)
{
for(j=0; j<NB; j++)
printf("%7.2f+%7.2fi%s",
vsip_real_f(vsip_cmget_f(X,i,j)),
vsip_imag_f(vsip_cmget_f(X,i,j)),(j == NB-1) ? "":",");
(i == NN - 1) ? printf("]\n") : printf(";\n");
}
}
{vsip_cqr_f* qrAop = vsip_cqrd_create_f(M,N, QOPT);
if(qrAop == NULL) exit(1);
{int i,j;
printf("matrix A after factorisation\n R/Q -- \n");
if(QOPT == VSIP_QRD_SAVEQ1)
{
printf("qrd } returns %i\n",vsip_cqrd_f(qrAop,A));
printf("matrix A after factorisation: skinny Q explicitly\n Q1 = [\n");
for(i= 0; i< M ; i++)
{
for(j=0; j< N; j++)
printf("%8.4f+%8.4fi%s",
vsip_real_f(vsip_cmget_f(A,i,j)),
vsip_imag_f(vsip_cmget_f(A,i,j)),(j == N-1) ? "":",");
(i == M - 1) ? printf("]\n") : printf(";\n");
}
} else if(QOPT == VSIP_QRD_SAVEQ || QOPT == VSIP_QRD_NOSAVEQ)
{
printf("qrd returns %i\n",vsip_cqrd_f(qrAop,A));
printf("matrix A after fact.: R and ");
(QOPT == VSIP_QRD_SAVEQ) ? printf("full Q implicitly\n Q/R = [\n") :
printf("Q not saved -- ignore LT portion. \n R = [\n");
for(i= 0; i<M ; i++)
{
for(j=0; j< N; j++)
printf("%9.5f+%9.5fi%s",
vsip_real_f(vsip_cmget_f(A,i,j)),
vsip_imag_f(vsip_cmget_f(A,i,j)),(j == N-1) ? "":",");
(i == M - 1) ? printf("]\n") : printf(";\n");
}
}
}
if( QPROB == VSIP_LLS)
{
if (QOPT == VSIP_QRD_SAVEQ1 || QOPT == VSIP_QRD_SAVEQ)
{
if((solretval=vsip_cqrsol_f(qrAop, QPROB, X)))
{
printf("WARNING -- Least Squares soln returns %i-- CHECK\n",
solretval);
printf("Upper triang. mat. R, possibly singular\n");
}
else
printf("Least Squares soln returns %i\n", solretval);
}
else
{
printf("Least Squares systems cannot be solved by the NOSAVEQ option -- exiting\n");
exit(1);
}
}
else
{
if((solretval=vsip_cqrsol_f(qrAop,QPROB, X)))
{
printf("Covariance soln returns %i\n",solretval);
printf("Upper triang. mat. R, possibly singular\n");
}
else
printf("Covariance soln returns %i\n",solretval);
}
vsip_cqrd_destroy_f(qrAop);
}
{int i,j;
printf("Soln Matrix\nX = [\n");
for(i=0; i<N; i++)
{
for(j=0; j<NB; j++)
printf("%9.5f+%9.5fi%s",
vsip_real_f(vsip_cmget_f(X,i,j)),
vsip_imag_f(vsip_cmget_f(X,i,j)),(j == NB-1) ? "":",");
(i == N - 1) ? printf("]\n") : printf(";\n");
}
}
vsip_cmalldestroy_f(X);
vsip_cmalldestroy_f(A);
} vsip_finalize((void*)0); return 1;
}
static int qr_solve(qr_type *qr, vsip_qrd_prob p, matrix_type *m)
{ return vsip_cqrsol_f(qr, p, m);}