Skewness

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).

See Also

kurtosis