**'cern.jet.random.ChiSquare'**Java class

cern.jet.random

## Class ChiSquare

- All Implemented Interfaces:
- DoubleFunction, IntFunction, Serializable, Cloneable

public class ChiSquareextends AbstractContinousDistribution

ChiSquare distribution; See the math definition and animated definition.- A special case of the Gamma distribution.
`p(x) = (1/g(f/2)) * (x/2)^(f/2-1) * exp(-x/2)`with`g(a)`being the gamma function and`f`being the degrees of freedom.Valid parameter ranges:

`freedom > 0`.Instance methods operate on a user supplied uniform random number generator; they are unsynchronized.

- Static methods operate on a default uniform random number generator; they are synchronized.
**Implementation:**- Method: Ratio of Uniforms with shift.
- High performance implementation. This is a port of RandChiSquare used in CLHEP 1.4.0 (C++). CLHEP's implementation, in turn, is based on
`chru.c`from the C-RAND / WIN-RAND library. C-RAND's implementation, in turn, is based uponJ.F. Monahan (1987): An algorithm for generating chi random variables, ACM Trans. Math. Software 13, 168-172.

- See Also:
- Serialized Form

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