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Variance Series Function

The Variance series function is used to calculate the variance of the data in the source series. This series function takes one or multiple source series. If only one source series is provided, all data in the value component of the destination series will be assigned with the variance of the values in the function domain of the value component of the source series. If multiple source series are provided, each value in the value component of the destination series is the variance of the corresponding data in the value components of the individual source series.

Two types of variances are supported: population variance and sample variance. The user can select the type of variance to calculate on the Variance tab-page of the Series Function dialog box. A population variance is calculated using

A sample variance is calculated using

If multiple source series are provided but their position components contain incompatible data (e.g. the first contains 1, 2, 4, 5 and the second contains 1, 2, 3, 5), DataScene will first use cubic-spline interpolation to generate compatible position and value components for the source series and then calculate the variances.

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