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# PetscConvEstRateView
Displays the convergence rate to a viewer 
## Synopsis
```
#include "petscconvest.h" 
PetscErrorCode PetscConvEstRateView(PetscConvEst ce, const PetscReal alpha[], PetscViewer viewer)
```
Collective


## Parameter

- ***snes -*** iterative context obtained from `SNESCreate()`
- ***alpha -*** the convergence rate for each field
- ***viewer -*** the viewer to display the reason



## Options Database Key

- ***-snes_convergence_estimate -*** print the convergence rate





## See Also
 `PetscConvEst`, `PetscConvEstGetRate()`

## Level
developer

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/utils/convest.c.html#PetscConvEstRateView">src/snes/utils/convest.c</A>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/snes/utils/convest.c)


[Index of all SNES routines](index.md)  
[Table of Contents for all manual pages](/manualpages/index.md)  
[Index of all manual pages](/manualpages/singleindex.md)