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Matrix-Vector Product (Symmetric) (G Dataflow)

Version:
    Last Modified: March 15, 2017

    Calculates the product of a symmetric matrix and a vector.

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    A

    Symmetric matrix.

    A must have at least N rows and N columns, where N is the number of elements in x.

    This node multiplies the first N rows and first N columns of the upper or lower triangular component of A by x, depending on the value you wire to matrix A type.

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    x

    N-element vector.

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    y

    Input vector.

    y must have at least N elements, where N equals the number of elements in x. If y is an empty vector, this node initializes y to be an N-element vector with all elements set to 0.

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    matrix A type

    Triangular component of A that this node uses for the calculation.

    Name Value Description
    Lower Triangular 2 Uses the lower triangular component of A for the calculation.
    Upper Triangular 3 Uses the upper triangular component of A for the calculation.

    Default: Upper Triangular

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    error in

    Error conditions that occur before this node runs.

    The node responds to this input according to standard error behavior.

    Standard Error Behavior

    Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

    error in does not contain an error error in contains an error
    If no error occurred before the node runs, the node begins execution normally.

    If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

    If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

    Default: No error

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    alpha

    Scalar that scales A * x.

    Default: 1

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    beta

    Scalar that scales y.

    Default: 1

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    dsymv

    Vector of the same size as y.

    For the first N elements, dsymv returns the result of alpha * A * x + beta * y. For any remaining elements, dsymv returns the value of the element in y with the same index.

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    error out

    Error information.

    The node produces this output according to standard error behavior.

    Standard Error Behavior

    Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

    error in does not contain an error error in contains an error
    If no error occurred before the node runs, the node begins execution normally.

    If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

    If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

    Where This Node Can Run:

    Desktop OS: Windows

    FPGA: This product does not support FPGA devices


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