DSSetDimensions#

Resize the matrices in the DS object.

Synopsis#

#include "slepcds.h" 
PetscErrorCode DSSetDimensions(DS ds,PetscInt n,PetscInt l,PetscInt k)

Logically Collective

Input Parameters#

  • ds - the direct solver context

  • n - the new size

  • l - number of locked (inactive) leading columns

  • k - intermediate dimension (e.g., position of arrow)

Notes#

The internal arrays are not reallocated.

Some DS types have additional dimensions, e.g., the number of columns in DSSVD. For these, you should call a specific interface function.

Use PETSC_CURRENT to leave any of the values unchanged. Use PETSC_DETERMINE to set n to the leading dimension, l to the minimum value (0), and k to n/2.

See Also#

DS: Direct Solver (or Dense System), DSGetDimensions(), DSAllocate(), DSSVDSetDimensions()

Level#

intermediate

Location#

src/sys/classes/ds/interface/dsops.c

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