naginterfaces.library.blas.zddscl

naginterfaces.library.blas.zddscl(d, x)

zddscl multiplies a complex vector by a real diagonal matrix.

For full information please refer to the NAG Library document for f06kc

https://support.nag.com/numeric/nl/nagdoc_30.2/flhtml/f06/f06kcf.html

Parameters

dfloat, array-like, shape $\left(n\right)$

The vector $d$.

xcomplex, array-like, shape $\left(n\right)$

The array $x$ must contain the $n$-element vector $x$.

Returns

xcomplex, ndarray, shape $\left(n\right)$

The updated vector $x$.

Notes

No equivalent traditional C interface for this routine exists in the NAG Library.

zddscl performs the operation

$$x\leftarrow Dx$$

where $x$ is an $n$-element complex vector and $D=diag\left(d\right)$ is a real diagonal matrix.

Equivalently, the function performs the element-by-element product of the vectors $x$ and $d$

$$x_i=d_i{x}_i\text{,}i=1,2,\dots ,n\text{.}$$