?? convolve.cc
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/*************************************************************************** * blitz/array/convolve.cc One-dimensional convolution * * Copyright (C) 1997-2001 Todd Veldhuizen <tveldhui@oonumerics.org> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * Suggestions: blitz-dev@oonumerics.org * Bugs: blitz-bugs@oonumerics.org * * For more information, please see the Blitz++ Home Page: * http://oonumerics.org/blitz/ * ****************************************************************************/#ifndef BZ_ARRAY_CONVOLVE_CC#define BZ_ARRAY_CONVOLVE_CCBZ_NAMESPACE(blitz)template<typename T>Array<T,1> convolve(const Array<T,1>& B, const Array<T,1>& C){ int Bl = B.lbound(0), Bh = B.ubound(0); int Cl = C.lbound(0), Ch = C.ubound(0); int lbound = Bl + Cl; int ubound = Bh + Ch; Array<T,1> A(Range(lbound,ubound)); for (int i=lbound; i <= ubound; ++i) { int jl = i - Ch; if (jl < Bl) jl = Bl; int jh = i - Cl; if (jh > Bh) jh = Bh; T result = 0; for (int j=jl; j <= jh; ++j) result += B(j) * C(i-j); A(i) = result; } return A;}BZ_NAMESPACE_END#endif // BZ_ARRAY_CONVOLVE_CC
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