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

The data types you wire to the A and C inputs determine the polymorphic instance to use.


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Inputs/Outputs

  • ci32.png operation A —

    operation A specifies the operation the VI performs on A to generate matrix op(A).

    0Direct (default)
    1Conjugated & Transposed
    2Transposed
  • c2ddbl.png A —

    A is a real matrix with dimensions N × K.

  • c2ddbl.png C —

    C is a real symmetric matrix of at least dimensions N × K, or K × N if you set operation A to Transposed.

  • ci32.png matrix C type —

    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–k update.
    3Upper Triangular (default)—The VI uses only the upper triangular component of C to calculate the rank–k update.
  • cdbl.png alpha —

    alpha is a real scalar that scales A*A^T or A^T*A, where A^T represents A transposed. The default is 1.

  • cdbl.png beta —

    beta is a real scalar that scales C.

    The default is 1.

  • i2ddbl.png dsyrk —

    dsyrk is a real matrix of the same dimensions as C.

    For the elements in the first N rows and N columns of the triangular component you select for matrix C type, dsyrk returns the results of the calculation. For any other elements, dsyrk returns the value of the element in C with the same index.

  • ii32.png error —

    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.

    • Refer to the BLAS (Basic Linear Algebra Subprograms) website at netlib.org for more information on BLAS functions.