skewnessDS2 {dsBase}

R Documentation

Calculates the skewness of a numeric variable

Description

This function calculates summary statistics that are returned to the client-side and used for the estimation of the combined skewness of a numeric variable across all studies.

Usage

skewnessDS2(x, global.mean)

Arguments

x	a string character, the name of a numeric variable.
global.mean	a numeric, the combined mean of the input variable across all studies.

Details

The function calculates the sum of squared differences between the values of x and the global mean of x across all studies, the sum of cubed differences between the values of x and the global mean of x across all studies and the number of valid observations of the input variable x.

Value

a list including the sum of cubed differences between the values of x and the global mean of x across all studies, the sum of squared differences between the values of x and the global mean of x across all studies, the number of valid observations (i.e. the length of x after excluding missing values), and a validity message indicating indicating a valid analysis if the number of valid observations are above the protection filter nfilter.tab or invalid analysis otherwise.

Author(s)

Demetris Avraam, for DataSHIELD Development Team

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