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BASIC Source File  |  1993-01-29  |  785 b   |  19 lines
  1. '   +----------------------------------------------------------------------+
  2. '   |                                                                      |
  3. '   |        BASWIZ  Copyright (c) 1990-1993  Thomas G. Hanlin III         |
  4. '   |                                                                      |
  5. '   |                      The BASIC Wizard's Library                      |
  6. '   |                                                                      |
  7. '   +----------------------------------------------------------------------+
  8.  
  9.    DEFSNG A-Z
  10.  
  11. FUNCTION ErfS! (Nr AS SINGLE)
  12.    N = INT(14! * Nr + 3!)
  13.    S = 1! / (2! * N - 1!)
  14.    FOR J = N - 1! TO 1! STEP -1!
  15.       S = 1! / (2! * J - 1!) - Nr * Nr / J * S
  16.    NEXT
  17.    ErfS! = Nr / .886227! * S
  18. END FUNCTION
  19.