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

Details  

	x is an N–element vector.
	y is an N–element vector.
	A is a Hermitian matrix of at least N rows and N columns. The default is an N × N matrix with all elements equal to 0.
	matrix A type specifies whether to update the upper or lower triangular component of A. 2 Lower Triangular—The VI uses only the lower triangular component of A to calculate the update. 3 Upper Triangular (default)—The VI uses only the upper triangular component of A to calculate the update.
	alpha is a real scalar that scales x*y^H and y*x^H, where x^H is the same as conj(x'). The default is 1.
	zher2 is a complex matrix of the same dimensions as A. For the elements of the first N rows and N columns of the triangular component you select for matrix A type, zher2 returns the results of the calculation. For any remaining elements, zher2 returns the value of the element in A 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.

zher2 - Hermitian Matrix Rank-2 Update (CDB) Details

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