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


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