skewnessDS2 {dsBase} | R Documentation |
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)
x |
a string character, the name of a numeric variable. |
global.mean |
a numeric, the combined mean of the input variable across all studies. |
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.
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.
Demetris Avraam, for DataSHIELD Development Team