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Full Discussion: rand()
Top Forums Programming rand() Post 28023 by omran on Wednesday 11th of September 2002 10:20:49 AM
Old 09-11-2002
rand()

Hi all,
Is the rand() function in C uniform or normal distribution. If it is unform, is there a random function that is normal.
Thanks and Regards
 

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dlarnv.f(3)							      LAPACK							       dlarnv.f(3)

NAME
dlarnv.f - SYNOPSIS
Functions/Subroutines subroutine dlarnv (IDIST, ISEED, N, X) DLARNV Function/Subroutine Documentation subroutine dlarnv (integerIDIST, integer, dimension( 4 )ISEED, integerN, double precision, dimension( * )X) DLARNV Purpose: DLARNV returns a vector of n random real numbers from a uniform or normal distribution. Parameters: IDIST IDIST is INTEGER Specifies the distribution of the random numbers: = 1: uniform (0,1) = 2: uniform (-1,1) = 3: normal (0,1) ISEED ISEED is 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. N N is INTEGER The number of random numbers to be generated. X X is DOUBLE PRECISION array, dimension (N) The generated random numbers. Author: Univ. of Tennessee Univ. of California Berkeley Univ. of Colorado Denver NAG Ltd. Date: November 2011 Further Details: This routine calls the auxiliary routine DLARUV to generate random real numbers from a uniform (0,1) distribution, in batches of up to 128 using vectorisable code. The Box-Muller method is used to transform numbers from a uniform to a normal distribution. Definition at line 98 of file dlarnv.f. Author Generated automatically by Doxygen for LAPACK from the source code. Version 3.4.1 Sun May 26 2013 dlarnv.f(3)
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