DSSetDimensions — SLEPc 3.24.2 documentation

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# 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

Index of all DS routines Table of Contents for all manual pages Index of all manual pages