PETSc version 3.17.4
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# TSEvaluateWLTE

Evaluate the weighted local truncation error norm at the end of a time step with a given order of accuracy.

### Synopsis

    #include "petscts.h"
    PetscErrorCode TSEvaluateWLTE(TS ts,NormType wnormtype,PetscInt *order,PetscReal *wlte)

Collective on TS

### Input Parameters

| ts | - time stepping context
| wnormtype | - norm type, either NORM_2 or NORM_INFINITY

### Input/Output Parameter

| order | - optional, desired order for the error evaluation or PETSC_DECIDE; on output, the actual order of the error evaluation

### Output Parameter

| wlte | - the weighted local truncation error norm

### Notes

If the timestepper cannot evaluate the error in a particular step (eg. in the first step or restart steps after event handling), this routine returns wlte=-1.0 .

### See Also

TSStep(), TSAdapt, TSErrorWeightedNorm()

### Level

advanced

### Location

src/ts/interface/ts.c

### Implementations

TSEvaluateWLTE_BDF in src/ts/impls/bdf/bdf.c
TSEvaluateWLTE_Alpha in src/ts/impls/implicit/alpha/alpha1.c
TSEvaluateWLTE_Alpha in src/ts/impls/implicit/alpha/alpha2.c
TSEvaluateWLTE_Theta in src/ts/impls/implicit/theta/theta.c
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