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30 lines
1.1 KiB
C++
30 lines
1.1 KiB
C++
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/*
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Copyright (C) 1988 Free Software Foundation
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written by Dirk Grunwald (grunwald@cs.uiuc.edu)
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This file is part of the GNU C++ Library. This library is free
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software; you can redistribute it and/or modify it under the terms of
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the GNU Library General Public License as published by the Free
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Software Foundation; either version 2 of the License, or (at your
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option) any later version. This library is distributed in the hope
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that it will be useful, but WITHOUT ANY WARRANTY; without even the
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implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the GNU Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free Software
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Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifdef __GNUG__
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#pragma implementation
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#endif
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#include <builtin.h>
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#include <Random.h>
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#include <HypGeom.h>
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double HyperGeometric::operator()()
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{
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double d = (pGenerator -> asDouble() > pP) ? (1.0 - pP) : (pP);
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return(-pMean * log(pGenerator -> asDouble()) / (2.0 * d) );
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}
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