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BLASdgemv Method

Performing matrix-vector product on the form
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y = alpha*op(A)*x + beta*y
where op(A) is of size (m x n) (m rows, n columns), alpha and beta are scalars, x and y are vectors.

If incx and incy is different from 1, the size of x and y must be at least:

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(1+(n-1)*abs(incx/y)) or (1+(m - 1)*abs(incx/y))
instead of n and m respectively.

Namespace:  DHIMath.Numerics
Assembly:  DHI.Mike1D.Generic (in DHI.Mike1D.Generic.dll) Version: 16.0.0.0 (11.1.1.1111)
Syntax
C#
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public static void dgemv(
	BlasTranspose trans,
	int m,
	int n,
	double alpha,
	double[] a,
	int lda,
	double[] x,
	int incx,
	double beta,
	double[] y,
	int incy
)

Parameters

trans
Type: DHIMath.NumericsBlasTranspose
'N'/'n' for A*x, 'T'/'t' for A'*x, 'C'/'c' for conjg(A')*x
m
Type: SystemInt32
Number of rows in A
n
Type: SystemInt32
Number of columns in A
alpha
Type: SystemDouble
Alpha scalar
a
Type: SystemDouble
Matrix A in column major order (first column first)
lda
Type: SystemInt32
Leading dimension of a, usually m, but can be larger.
x
Type: SystemDouble
Array of size n for trans 'N', otherwise of size m
incx
Type: SystemInt32
Increment in vector x, usually 1, but can be larger.
beta
Type: SystemDouble
Beta scalar. When beta = 0, y need not be initialized
y
Type: SystemDouble
Array of size m for trans='N', otherwise of size n
incy
Type: SystemInt32
Increment in vector y, usually 1, but can be larger.
See Also