ScriptIntrinsicBLAS.DSPR(Int32, Double, Allocation, Int32, Allocation) Method
Definition
Important
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DSPR performs the rank 1 operation A := alphaxx**T + A
[Android.Runtime.Register("DSPR", "(IDLandroid/renderscript/Allocation;ILandroid/renderscript/Allocation;)V", "", ApiSince=23)]
public void DSPR (int Uplo, double alpha, Android.Renderscripts.Allocation? X, int incX, Android.Renderscripts.Allocation? Ap);[<Android.Runtime.Register("DSPR", "(IDLandroid/renderscript/Allocation;ILandroid/renderscript/Allocation;)V", "", ApiSince=23)>]
member this.DSPR : int * double * Android.Renderscripts.Allocation * int * Android.Renderscripts.Allocation -> unitParameters
- Uplo
- Int32
Specifies whether the upper or lower triangular part is to be supplied in the packed form.
- alpha
- Double
The scalar alpha.
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.
- Ap
- Allocation
The input allocation contains matrix A, supported elements type Element#F64.
- Attributes
Remarks
DSPR performs the rank 1 operation A := alpha*x*x**T + A
Details: http://www.netlib.org/lapack/explore-html/dd/dba/dspr_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]
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.