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zher2k - Hermitian Matrix Rank-2k Update (CDB) (Not in Base Package)

LabVIEW 8.5 Help
August 2007

NI Part Number:
371361D-01

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Calculates the rank–2k update of the upper or lower triangular component of a Hermitian matrix.

Details  

operation specifies the operation the VI performs on A and B, resulting in matrices op(A) and op(B).

0Direct (default)
1Conjugated & Transposed
2Transposed
A is a complex matrix of dimensions N × K.
B is a complex matrix. op(B) must have the same dimensions as op(A).
C is a Hermitian matrix. If you set operation to Not Transposed, the VI uses the first N rows of C for the update. The number of rows and columns in C must be greater than or equal to N. The default is an N × N matrix with all zero elements.
matrix C type specifies whether to update the upper or lower triangular component of C.

2Lower Triangular—The VI uses only the lower triangular component of C to calculate the rank–2k update.
3Upper Triangular (default)—The VI uses only the upper triangular component of C to calculate the rank–2k update.
alpha is a complex scalar that scales A*B^H or A^H*B, where A^H is the same as conj(A'). The default is 1.
beta is a real scalar that scales C. The default is 1.
zher2k is a complex matrix of the same dimensions as C. For the first N rows and N columns of the triangular component you select for matrix C type, zher2k returns the results of the calculation. For any remaining rows and columns, zher2k returns the element in C with the same index.
error returns any error or warning from the VI. You can wire error to the Error Cluster From Error Code VI to convert the error code or warning into an error cluster.

zher2k - Hermitian Matrix Rank-2k Update (CDB) Details

Refer to BLAS (Basic Linear Algebra Subprograms) for more information on the BLAS functions.


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