slepc-main 2024-12-17
STFilterSetInterval
Defines the interval containing the desired eigenvalues.
Synopsis
#include "slepcst.h"
PetscErrorCode STFilterSetInterval(ST st,PetscReal inta,PetscReal intb)
Logically Collective
Input Parameters
| st | - the spectral transformation context
|
| inta | - left end of the interval
|
| intb | - right end of the interval
|
Options Database Key
| -st_filter_interval <a,b> | - set [a,b] as the interval of interest
|
Notes
The filter will be configured to emphasize eigenvalues contained in the given
interval, and damp out eigenvalues outside it. If the interval is open, then
the filter is low- or high-pass, otherwise it is mid-pass.
Common usage is to set the interval in EPS with EPSSetInterval().
The interval must be contained within the numerical range of the matrix, see
STFilterSetRange().
See Also
STFilterGetInterval(), STFilterSetRange(), EPSSetInterval()
Level
intermediate
Location
src/sys/classes/st/impls/filter/filter.c
Index of all ST routines
Table of Contents for all manual pages
Index of all manual pages