# Axpby

Adds a scalar multiple of a vector to a multiple of this vector. (this=alpha*xx + beta*this)

## Synopsis

    #include "tao_solver.h"
    int TaoVec::Axpby( double alpha, TaoVec* xx, double beta )

## Input Parameter

| alpha | - the scalar of tx
| xx | - the vector
| beta | - the scalar multiple of this vector

## See Also

TaoVec::Axpy(), TaoVec::Aypx()

Level:intermediate
Location:src/vector/taovec.c
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