TSForwardSetSensitivities

Sets the initial value of the trajectory sensitivities of solution w.r.t. the problem parameters and initial values.

Synopsis

#include <petscts.h>  
PetscErrorCode TSForwardSetSensitivities(TS ts, PetscInt nump, Mat Smat)

Logically Collective

Input Parameters

• ts - the TS context obtained from TSCreate()

• nump - number of parameters

• Smat - sensitivities with respect to the parameters, the number of entries in these vectors is the same as the number of parameters

Notes

Use PETSC_DETERMINE to use the number of columns of Smat for nump

Forward sensitivity is also called ‘trajectory sensitivity’ in some fields such as power systems. This function turns on a flag to trigger TSSolve() to compute forward sensitivities automatically. You must call this function before TSSolve(). The entries in the sensitivity matrix must be correctly initialized with the values S = dy/dp|startingtime.

See Also

TS: Scalable ODE and DAE Solvers, TSForwardGetSensitivities(), TSForwardSetIntegralGradients(), TSForwardGetIntegralGradients(), TSForwardStep()

Level

beginner

Location

src/ts/interface/sensitivity/tssen.c

Examples

src/ts/tutorials/ex16fwd.c
src/ts/tutorials/ex23fwdadj.c
src/ts/tutorials/ex20fwd.c

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