Random Class Reference

#include <Random.h>

List of all members.

Public Member Functions
	Random (Integer a=16807, Integer b=0, Integer c=Musimat_Random_Seed)
	Default constructor. Initialization constants from Park and Miller.
Integer	lCRandom ()
	Linear congruential method of random number generation. See Knuth, "Seminumerical Methods".
Real	random (Real L, Real U)
	Return a random value as a Real within a range of Reals.
Integer	random (Integer L, Integer U)
	Return a random value as a Real within a range of Reals.
Integer	seed (Integer s)
	Return old random seed, set new seed.
Integer	getTime ()
	Return number of seconds since epoch.

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Detailed Description

Definition at line 32 of file Random.h.

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Constructor & Destructor Documentation

Random::Random	(	Integer	a = 16807,
		Integer	b = 0,
		Integer	c = Musimat_Random_Seed
	)		[inline]

Default constructor. Initialization constants from Park and Miller.

Definition at line 37 of file Random.h.

: m_a(a), m_b(b), m_c(c) { m_x = 1; }

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Member Function Documentation

Integer Random::getTime

(

)

Return number of seconds since epoch.

Used to automatically obtain fluctuating random sequences.

Returns:

Time in seconds since the epoch.

Definition at line 42 of file Random.cpp.

References Return.

Referenced by Time().

{
        Return( Integer(time(0)) );  // time_t
}

Integer Random::lCRandom

(

)

[inline]

Linear congruential method of random number generation. See Knuth, "Seminumerical Methods".

Definition at line 40 of file Random.h.

References If, and Return.

Referenced by LCRandom(), and random().

                            {
                m_x = mod( m_a * m_x + m_b, m_c );      // update x based on its previous value
                Integer r = m_x;
                If ( r < 0 )                                            // force the result to be positive                                                      
                        r = -r; 
                Return( r ); 
        }

Real Random::random	(	Real	L,
		Real	U
	)		[inline]

Return a random value as a Real within a range of Reals.

Parameters:

L	Lower bound
U	Upper bound

Returns:

Random Real value

Definition at line 52 of file Random.h.

References lCRandom(), and Return.

Referenced by IRandom(), Random(), and random().

                                      {
                Real r = lCRandom();
                r = r / Real( m_c );
                Return( r * ( U - L ) + L );
        }

Integer Random::random	(	Integer	L,
		Integer	U
	)		[inline]

Return a random value as a Real within a range of Reals.

Parameters:

L	Lower bound
U	Upper bound

Returns:

Random Integer value

Definition at line 62 of file Random.h.

References random(), and Return.

                                               {
                Real i = random( Real( L ), U + 1.0 );
                Return( Integer( i ) );
        }

Integer Random::seed

(

Integer

s )

[inline]

Return old random seed, set new seed.

Parameters:

s	New Integer seed

Returns:

Old Integer seed

Definition at line 70 of file Random.h.

References Return.

Referenced by SeedRandom().

                                  {
                Integer r = m_x;
                m_x = s;
                Return( r );
        }

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The documentation for this class was generated from the following files:

• /Users/garethloy/Musimathics/Musimat1.2/include/Random.h
• /Users/garethloy/Musimathics/Musimat1.2/MusimatLib/Random.cpp