SKEWNESS Function (PV-WAVE Extreme Advantage)

Computes the skewness of an array.

Usage

result = SKEWNESS(array)

Input Parameters

array—An array of any data type except string.

Returned Value

result—A scalar value containing the skewness of the array.

Keywords

None.

Discussion

Computes the skewness of array(k, l) as:

where mean = AVG(array) and std = STDEV(array).

The skewness is a useful measure for statistical texture analysis.

Example

; Read an image.

image = IMAGE_READ(!IP_Data + 'noise_test.tif')

; Compute the skewness of the image.

skew = SKEWNESS(image('pixels'))

PRINT, 'Skewness = ', skew