1 Residual norms for sys1_sys2_regressor_linear_ solve. 2 0 KSP Residual norm 9.082951062292e+00 3 1 KSP Residual norm 0.000000000000e+00 4PetscRegressor Object: (sys1_sys2_) 1 MPI process 5 type: linear 6 PetscRegressor Linear Type: ols 7 KSP Object: (sys1_sys2_regressor_linear_) 1 MPI process 8 type: lsqr 9 standard error not computed 10 using inexact matrix norm 11 maximum iterations=10000, initial guess is zero 12 tolerances: relative=1e-05, absolute=1e-50, divergence=10000. 13 left preconditioning 14 using UNPRECONDITIONED norm type for convergence test 15 PC Object: (sys1_sys2_regressor_linear_) 1 MPI process 16 type: none 17 linear system matrix, followed by the matrix used to construct the preconditioner: 18 Mat Object: 1 MPI process 19 type: seqaij 20 rows=10, cols=10 21 total: nonzeros=10, allocated nonzeros=10 22 total number of mallocs used during MatSetValues calls=0 23 not using I-node routines 24 Mat Object: 1 MPI process 25 type: normal 26 rows=10, cols=10 27 total KSP iterations: 1 28