All Packages  Class Hierarchy  This Package  Previous  Next  Index

Class org.netlib.lapack.Dlaran

java.lang.Object
   |
   +----org.netlib.lapack.Dlaran

public class Dlaran

extends Object

Following is the description from the original
Fortran source.  For each array argument, the Java
version will include an integer offset parameter, so
the arguments may not match the description exactly.
Contact seymour@cs.utk.edu with any questions.

 *     ..
 *
 *  Purpose
 *  =======
 *
 *  DLARAN returns a random real number from a uniform (0,1)
 *  distribution.
 *
 *  Arguments
 *  =========
 *
 *  ISEED   (input/output) INTEGER array, dimension (4)
 *          On entry, the seed of the random number generator; the array
 *          elements must be between 0 and 4095, and ISEED(4) must be
 *          odd.
 *          On exit, the seed is updated.
 *
 *  Further Details
 *  ===============
 *
 *  This routine uses a multiplicative congruential method with modulus
 *  2**48 and multiplier 33952834046453 (see G.S.Fishman,
 *  'Multiplicative congruential random number generators with modulus
 *  2**b: an exhaustive analysis for b = 32 and a partial analysis for
 *  b = 48', Math. Comp. 189, pp 331-344, 1990).
 *
 *  48-bit integers are stored in 4 integer array elements with 12 bits
 *  per element. Hence the routine is portable across machines with
 *  integers of 32 bits or more.
 *
 *  =====================================================================
 *
 *     .. Parameters ..

Dlaran()

dlaran(int[], int)

 public Dlaran()

 public static double dlaran(int iseed[],
                             int _iseed_offset)

All Packages  Class Hierarchy  This Package  Previous  Next  Index