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.

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.

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.

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.

Author

Demetris Avraam, for DataSHIELD Development Team