naginterfaces.library.blas.dscal

naginterfaces.library.blas.dscal(alpha, x)[source]

dscal multiplies a real vector by a real scalar.

For full information please refer to the NAG Library document for f06ed

https://www.nag.com/numeric/nl/nagdoc_28.7/flhtml/f06/f06edf.html

Parameters
alphafloat

The scalar .

xfloat, ndarray, shape , modified in place

On entry: the -element vector .

On exit: the vector .

Raises
NagValueError
(errno )

On entry, error in parameter .

Constraint: .

Notes

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

dscal performs the operation

where is an -element real vector, and is a real scalar.

References

Lawson, C L, Hanson, R J, Kincaid, D R and Krogh, F T, 1979, Basic linear algebra supbrograms for Fortran usage, ACM Trans. Math. Software (5), 308–325