VecMAXPBY

Computes y = beta y + sum alpha[i] x[i]

Synopsis

#include "petscvec.h"   
PetscErrorCode VecMAXPBY(Vec y, PetscInt nv, const PetscScalar alpha[], PetscScalar beta, Vec x[])

Logically Collective

Input Parameters

• nv - number of scalars and x-vectors

• alpha - array of scalars

• beta - scalar

• y - one vector

• x - array of vectors

Note

y cannot be any of the x vectors.

Developer Notes

This is a convenience routine, but implementations might be able to optimize it, for example, when beta is zero.

See Also

Vectors and Parallel Data, Vec, VecMAXPY(), VecAYPX(), VecWAXPY(), VecAXPY(), VecAXPBYPCZ(), VecAXPBY()

Level

intermediate

Location

src/vec/vec/interface/rvector.c

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Index of all Vec routines
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Index of all manual pages