Table Of Contents

var

Version:
    Last Modified: March 15, 2017

    Computes the variance of the input elements.

    Syntax

    y = var(x)
    y = var(x, w)
    y = var(x, w, d)

    Inputs

    x

    Scalar or array of any dimension.

    w

    Weight. w is a scalar or a vector. If w is a scalar, w is an indicator, which can only be 0 or 1. If w is a vector, w is the weight.

    d

    Specifies the dimension of x across which to compute the variance. d can be in a range of 1 to the maximum supported array dimension (32). If you do not specify d, the function works with the first dimension whose size is not equal to 1.

    Outputs

    y

    Variance of x. y is a scalar or an array.

    Further Information

    w can be in one of the following states:

    • If x is a vector, w is a vector of the same size as x. If x is an array, w is a vector of the same size as the dimension of x across which to compute the variance. All elements in w must be greater than 0. MathScript normalizes w so the sum of all the elements in w is equal to 1.
    • w is a vector with only one element, 1. The input array has no weight. MathScript normalizes the output by the length of the input array.
    • w is a vector with only one element, 0, or w is an empty vector. The input array has no weight. MathScript normalizes the output by the length of the input array minus one.
    X = [1, 2, 3, 4, 5, 6; 2, 4, 6, 8, 10, 12]
    Y = var(X)

    Where This Node Can Run:

    Desktop OS: Windows

    FPGA: This product does not support FPGA devices


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