KURTOSIS

The KURTOSIS function computes the statistical kurtosis of an n -element vector. If the variance of the vector is zero, the kurtosis is not defined, and KURTOSIS returns !VALUES.F_NAN as the result. KURTOSIS calls the IDL function MOMENT.

Calling sequence

Result = KURTOSIS( X )

Arguments

X

An n -element, floating-point or double-precision vector.

Keywords

DOUBLE

If this keyword is set, computations are performed in double precision arithmetic.

NAN

Set this keyword to cause the routine to check for occurrences of the IEEE floating-point value NaN in the input data. Elements with the value NaN are treated as missing data. (See Special Floating-Point Values for more information on IEEE floating-point values.)

Example

x = [65, 63, 67, 64, 68, 62, 70, 66, 68, 67, 69, 71, 66, 65, 70]
; Define the n-element vector of sample data.

result = KURTOSIS(x); Compute the kurtosis.

PRINT, result ; Print the result.

IDL prints

-1.18258