RAN: random number generation (H)

• generate pseudorandom numbers

  or an array of such numbers from x:
  • result = RAN( x )
  result is uniformly distributed in 0 ≤ result ≤ x
• change

  range of random numbers

  to x -a ≤ result ≤ x + a :
  • result = RAN( x, a )
• to set a

  random number seed

  use:
  • result = RAN( x, a, seed)
  • seed = 0 to initialize seed randomly from current date and time
  • 0 < seed < 2^31 initialize to seed
• an

  array of random numbers

  is generated by
  • array = RAN(x [, a ])
  e.g:

   array = RAN(  -100, 1 )
    -99.4434993014 -100.9606699555 -100.6602726956  -99.0105133638
    -99.4926150282 -100.5640524723  -99.6814148510  -99.9219632113
   -100.0398732603  -99.3215471214 -100.9491595894  -99.0212341071
  

  Note. x and a can be functions of the ⇒ array index $, e.g. for oscillating sequences