System object: dsp.Variance
Package: dsp

Variance of input


Y = step(H,X)
Y = step(H,X,R)


Y = step(H,X) computes the variance, Y, of input X over successive calls to the step method, when the RunningVariance property is true.

Y = step(H,X,R) resets its state based on the value of reset signal R , the ResetInputPort property and the ResetCondition property. This option applies when the RunningVariance property is true and the ResetInputPort property is set to true.

    Note:   H specifies the System object™ on which to run this step method.

    The object performs an initialization the first time the step method is executed. This initialization locks nontunable properties and input specifications, such as dimensions, complexity, and data type of the input data. If you change a nontunable property or an input specification, the System object issues an error. To change nontunable properties or inputs, you must first call the release method to unlock the object.

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