C# Class Encog.MathUtil.LinearCongruentialGenerator

A predictable random number generator. This is useful for unit tests and benchmarks where we want random numbers, but we want them to be the same each time. This class exists on both Java and C# so it can even provide consistent random numbers over the two platforms. Random numbers are created using a LCG. http://en.wikipedia.org/wiki/Linear_congruential_generator

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Public Methods

Method	Description
LinearCongruentialGenerator ( long seed ) : System	Construct the default LCG. You need only specify a seed.
LinearCongruentialGenerator ( long modulus, long multiplier, long increment, long seed ) : System	Create a LCG with the specified modulus, multiplier and increment. Unless you REALLY KNOW WHAT YOU ARE DOING, just use the constructor that just takes a seed. It will set these values to the same as set by the GCC C compiler. Setting these values wrong can create fairly useless random numbers.
NextDouble ( ) : double	The next random number as a double between 0 and 1.
NextLong ( ) : long	The next random number as a long between 0 and MAX_RAND.
Range ( double min, double max ) : double	Generate a random number in the specified range.

Method Details

LinearCongruentialGenerator() public method

Construct the default LCG. You need only specify a seed.

public LinearCongruentialGenerator ( long seed ) : System
seed	long	The seed.
return	System

LinearCongruentialGenerator() public method

Create a LCG with the specified modulus, multiplier and increment. Unless you REALLY KNOW WHAT YOU ARE DOING, just use the constructor that just takes a seed. It will set these values to the same as set by the GCC C compiler. Setting these values wrong can create fairly useless random numbers.

public LinearCongruentialGenerator ( long modulus, long multiplier, long increment, long seed ) : System
modulus	long	The modulus for the LCG algorithm.
multiplier	long	The multiplier for the LCG algorithm.
increment	long	The increment for the LCG algorithm.
seed	long	The seed for the LCG algorithm. Using the same seed will give /// the same random number sequence each time, whether in Java or /// DotNet.
return	System

NextDouble() public method

The next random number as a double between 0 and 1.

public NextDouble ( ) : double
return	double

NextLong() public method

The next random number as a long between 0 and MAX_RAND.

public NextLong ( ) : long
return	long

Range() public method

Generate a random number in the specified range.

public Range ( double min, double max ) : double
min	double	The minimum random number.
max	double	The maximum random number.
return	double