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# PetscDualSpaceCreateInteriorDataDefault
Create quadrature points by examining interior functionals and create the matrix mapping quadrature point values to interior dual space values 
## Synopsis
```
#include "petscfe.h" 
PetscErrorCode PetscDualSpaceCreateInteriorDataDefault(PetscDualSpace sp, PetscQuadrature *intNodes, Mat *intMat)
```

## Input Parameter

- ***sp -*** The dualspace



## Output Parameters

- ***intNodes -*** A `PetscQuadrature` object containing all evaluation points needed to evaluate interior degrees of freedom
- ***intMat    -*** A matrix that computes dual space values from point values: size [spdim0 x (npoints * nc)], where spdim0 is
the size of the constrained layout (`PetscSectionGetConstrainStorageSize()`) of the dual space section,
npoints is the number of points in allNodes and nc is `PetscDualSpaceGetNumComponents()`.





## See Also
 `PetscDualSpace`, `PetscQuadrature`, `Mat`, `PetscDualSpaceCreate()`, `PetscDualSpaceGetInteriorData()`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/dt/dualspace/interface/dualspace.c.html#PetscDualSpaceCreateInteriorDataDefault">src/dm/dt/dualspace/interface/dualspace.c</A>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/dm/dt/dualspace/interface/dualspace.c)


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