Function

# cblas_dcopy(_:_:_:_:_:)

Copies a vector to another vector (double-precision).

## Parameters

`N`

Number of elements in the vectors.

`X`

Source vector `X`.

`incX`

Stride within `X`. For example, if `incX` is 7, every 7th element is used.

`Y`

Destination vector `Y`.

`incY`

Stride within `Y`. For example, if `incY` is 7, every 7th element is used.

### Double-Precision Float Matrix Functions

`func cblas_dasum(Int32, UnsafePointer<Double>!, Int32) -> Double`

Computes the sum of the absolute values of elements in a vector (double-precision).

`func cblas_dnrm2(Int32, UnsafePointer<Double>!, Int32) -> Double`

Computes the L2 norm (Euclidian length) of a vector (double precision).

`func cblas_dscal(Int32, Double, UnsafeMutablePointer<Double>!, Int32)`

Multiplies each element of a vector by a constant (double-precision).

`func cblas_dspmv(CBLAS_ORDER, CBLAS_UPLO, Int32, Double, UnsafePointer<Double>!, UnsafePointer<Double>!, Int32, Double, UnsafeMutablePointer<Double>!, Int32)`

Scales a packed symmetric matrix, then multiplies by a vector, then scales and adds another vector (double precision).

`func cblas_dspr(CBLAS_ORDER, CBLAS_UPLO, Int32, Double, UnsafePointer<Double>!, Int32, UnsafeMutablePointer<Double>!)`

Rank one update: adds a packed symmetric matrix to the product of a scaling factor, a vector, and its transpose (double precision).

`func cblas_dsyr(CBLAS_ORDER, CBLAS_UPLO, Int32, Double, UnsafePointer<Double>!, Int32, UnsafeMutablePointer<Double>!, Int32)`

Rank one update: adds a symmetric matrix to the product of a scaling factor, a vector, and its transpose (double precision).