ScriptIntrinsicBLAS.DSPMV Method

Definition

Namespace:

Android.Renderscripts

Assembly:

Mono.Android.dll

DSPMV performs the matrix-vector operation y := alphaAx + beta*y

[Android.Runtime.Register("DSPMV", "(IDLandroid/renderscript/Allocation;Landroid/renderscript/Allocation;IDLandroid/renderscript/Allocation;I)V", "", ApiSince=23)]
public void DSPMV (int Uplo, double alpha, Android.Renderscripts.Allocation? Ap, Android.Renderscripts.Allocation? X, int incX, double beta, Android.Renderscripts.Allocation? Y, int incY);

[<Android.Runtime.Register("DSPMV", "(IDLandroid/renderscript/Allocation;Landroid/renderscript/Allocation;IDLandroid/renderscript/Allocation;I)V", "", ApiSince=23)>]
member this.DSPMV : int * double * Android.Renderscripts.Allocation * Android.Renderscripts.Allocation * int * double * Android.Renderscripts.Allocation * int -> unit

Parameters

Uplo

Int32

Specifies whether the upper or lower triangular part of the matrix A is supplied in packed form.

alpha

Double

The scalar alpha.

Ap

Allocation

The input allocation contains matrix A, supported elements type Element#F64.

X

Allocation

The input allocation contains vector x, supported elements type Element#F64.

incX

Int32

The increment for the elements of vector x, must be larger than zero.

beta

Double

The scalar beta.

Y

Allocation

The input allocation contains vector y, supported elements type Element#F64.

incY

Int32

The increment for the elements of vector y, must be larger than zero.

Attributes

RegisterAttribute

Remarks

DSPMV performs the matrix-vector operation y := alpha*A*x + beta*y

Details: http://www.netlib.org/lapack/explore-html/d4/d85/dspmv_8f.html

Note: For a N*N matrix, the input Allocation should be a 1D allocation of size dimX = N*(N+1)/2, The following subroutine can is an example showing how to convert a UPPER trianglar matrix 'a' to packed matrix 'b'. k = 0 for i in range(0, n): for j in range(i, n): b[k++] = a[i, j]

Java documentation for android.renderscript.ScriptIntrinsicBLAS.DSPMV(int, double, android.renderscript.Allocation, android.renderscript.Allocation, int, double, android.renderscript.Allocation, int).

Portions of this page are modifications based on work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2.5 Attribution License.