MATSEQAIJ#
MATSEQAIJ = “seqaij” - A matrix type to be used for sequential sparse matrices, based on compressed sparse row format.
Options Database Key#
-mat_type seqaij - sets the matrix type to “seqaij” during a call to MatSetFromOptions()
Notes#
MatSetValues() may be called for this matrix type with a NULL argument for the numerical values,
in this case the values associated with the rows and columns one passes in are set to zero
in the matrix
MatSetOptions(,MAT_STRUCTURE_ONLY,PETSC_TRUE) may be called for this matrix type. In this no
space is allocated for the nonzero entries and any entries passed with MatSetValues() are ignored
Developer Note#
It would be nice if all matrix formats supported passing NULL in for the numerical values
See Also#
Matrices, Mat, MatCreateSeqAIJ(), MatSetFromOptions(), MatSetType(), MatCreate(), MatType, MATSELL, MATSEQSELL, MATMPISELL
Level#
beginner
Location#
Examples#
src/ksp/ksp/tutorials/ex59.c
src/ksp/ksp/tutorials/ex76.c
src/ksp/ksp/tutorials/ex83f.F90
src/mat/tutorials/ex1.c
src/mat/tutorials/ex12.c
src/mat/tutorials/ex5cu.cu
src/tao/leastsquares/tutorials/tomography.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages