Skewness
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Purpose
Returns the skewness statistic for a vector or matrix.
Synopsis
- k = skewness(x)
- k = skewness(x,flag,dim)
Description
Returns the skewness statistic for a vector or matrix, x. Missing data is ignored for the calculation.
Inputs
- x = Vector or matrix.
Optional Inputs
- flag = bias-correction disable flag. When set to 0 (zero), the skewness is corrected for sampling bias. Default is 1 (one) to return the uncorrected skewness. The correction for bias is done by the formula:
- s = sqrt(n*(n-1))/(n-2) * s
- where n is the number of non-missing elements in the given column of x.
- dim = dimension of x over which to calculate the skewness. Default is 1, over rows (skewness calculated down columns.)
Outputs
- s = skewness of x over the specified dimension (dim).