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ncx2stat

Noncentral chi-square mean and variance

Syntax

[M,V] = ncx2stat(NU,DELTA)

Description

[M,V] = ncx2stat(NU,DELTA)returns the mean of and variance for the noncentral chi-square pdf withNUdegrees of freedom and noncentrality parameterDELTA.NUandDELTAcan be vectors, matrices, or multidimensional arrays that all have the same size, which is also the size ofMandV. A scalar input forNUorDELTAis expanded to a constant array with the same dimensions as the other input.

The mean of the noncentral chi-square distribution with parameters ν and δ isν+δ, and the variance is2(ν+2δ).

Examples

[m,v] = ncx2stat(4,2) m = 6 v = 16

References

[1] Evans, M., N. Hastings, and B. Peacock.Statistical Distributions. 2nd ed., Hoboken, NJ: John Wiley & Sons, Inc., 1993, pp. 50–52.

[2] Johnson, N., and S. Kotz.Distributions in Statistics: Continuous Univariate Distributions-2.Hoboken, NJ: John Wiley & Sons, Inc., 1970, pp. 130–148.

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.

Version History

Introduced before R2006a

See Also

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