ScriptIntrinsicBLAS.DSPMV Method
Definition
Important
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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 -> unitParameters
- 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.
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.
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
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]
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